Ford Fiesta: Anti-Lock Brake System (ABS) and Stability Control / Anti-Lock Brake System (ABS) and Stability Control. Diagnosis and Testing

Ford Fiesta 2014 - 2019 Service Manual / Brake System / Anti-Lock Brake System (ABS) and Stability Control / Anti-Lock Brake System (ABS) and Stability Control. Diagnosis and Testing

DTC Charts

DTC Chart: Anti-Lock Brake System (ABS) Module

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

ABS Module DTC Chart

DTC	Description	Action
B10DF:46	Master Cylinder Isolation Valve: Calibration / Parameter Memory Failure	This DTC sets due to an internal failure of the ABS module or a calibration failure between the HCU and the ABS module. Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration routine. CLEAR the DTC and REPEAT the self-test. If the DTC returns, REPEAT both calibration routines making sure to FOLLOW the diagnostic scan tool directions. CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0001:01	TCS Control Channel "A" Valve 1: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0002:01	TCS Control Channel "A" Valve 2: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0003:01	TCS Control Channel "B" Valve 1: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0004:01	TCS Control Channel "B" Valve 2: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0010:01	Left Front Inlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0011:01	Left Front Outlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0014:01	Right Front Inlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0015:01	Right Front Outlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0018:01	Left Rear Inlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0019:01	Left Rear Outlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C001C:01	Right Rear Inlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C001D:01	Right Rear Outlet Control: General Electrical Failure	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:11	ABS Pump Motor Control: Circuit Short To Ground	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the ABS module self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:12	ABS Pump Motor Control: Circuit Short To Battery	This DTC indicates that part of the ABS module has failed internally. CLEAR the DTC . REPEAT the ABS module self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:13	ABS Pump Motor Control: Circuit Open	GO to Pinpoint Test H
C0020:71	ABS Pump Motor Control: Actuator Stuck	GO to Pinpoint Test H
C0030:07	Left Front Tone Wheel: Mechanical Failure	GO to Pinpoint Test B
C0031:07	Left Front Wheel Speed Sensor: Mechanical Failure	GO to Pinpoint Test B
C0031:11	Left Front Wheel Speed Sensor: Circuit Short to Ground	GO to Pinpoint Test L
C0031:15	Left Front Wheel Speed Sensor: Circuit Short to Battery or Open	GO to Pinpoint Test L
C0031:29	Left Front Wheel Speed Sensor: Signal Invalid	GO to Pinpoint Test B
C0031:2F	Left Front Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test B
C0031:64	Left Front Wheel Speed Sensor: Signal Plausibility Failure	GO to Pinpoint Test B
C0033:07	Right Front Tone Wheel: Mechanical Failure	GO to Pinpoint Test B
C0034:07	Right Front Wheel Speed Sensor: Mechanical Failure	GO to Pinpoint Test B
C0034:11	Right Front Wheel Speed Sensor: Circuit Short to Ground	GO to Pinpoint Test L
C0034:15	Right Front Wheel Speed Sensor: Circuit Short to Battery or Open	GO to Pinpoint Test L
C0034:29	Right Front Wheel Speed Sensor: Signal Invalid	GO to Pinpoint Test B
C0034:2F	Right Front Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test B
C0034:64	Right Front Wheel Speed Sensor: Signal Plausibility Failure	GO to Pinpoint Test B
C0036:07	Left Rear Tone Wheel: Mechanical Failure	GO to Pinpoint Test B
C0037:07	Left Rear Wheel Speed Sensor: Mechanical Failure	GO to Pinpoint Test B
C0037:11	Left Rear Wheel Speed Sensor: Circuit Short to Ground	GO to Pinpoint Test M
C0037:15	Left Rear Wheel Speed Sensor: Circuit Short to Battery or Open	GO to Pinpoint Test M
C0037:29	Left Rear Wheel Speed Sensor: Signal Invalid	GO to Pinpoint Test B
C0037:2F	Left Rear Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test B
C0037:64	Left Rear Wheel Speed Sensor: Signal Plausibility Failure	GO to Pinpoint Test B
C0039:07	Right Rear Tone Wheel: Mechanical Failure	GO to Pinpoint Test B
C003A:07	Right Rear Wheel Speed Sensor: Mechanical Failure	GO to Pinpoint Test B
C003A:11	Right Rear Wheel Speed Sensor: Circuit Short to Ground	GO to Pinpoint Test M
C003A:15	Right Rear Wheel Speed Sensor: Circuit Short to Battery or Open	GO to Pinpoint Test M
C003A:29	Right Rear Wheel Speed Sensor: Signal Invalid	GO to Pinpoint Test B
C003A:2F	Right Rear Wheel Speed Sensor: Signal Erratic	GO to Pinpoint Test B
C003A:64	Right Rear Wheel Speed Sensor: Signal Plausibility Failure	GO to Pinpoint Test B
C0040:64	Brake Pedal Switch "A": Signal Plausibility Failure	GO to Pinpoint Test C
C0044:28	Brake Pressure Sensor "A": Signal Bias Level Out of Range / Zero Adjustment Failure	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:28 returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:47	Brake Pressure Sensor "A": Watchdog / Safety Failure	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:47 returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:49	Brake Pressure Sensor "A": Internal Electronic Failure	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:49 returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:51	Brake Pressure Sensor "A": Not Programmed	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:51 returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:64	Brake Pressure Sensor "A": Signal Plausibility Failure	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:64 returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSPECT the brake tubes and connections for damage and leaks. REPAIR or INSTALL new brake tubes as necessary. If brake tubes and connections are OK and there are no brake fluid leaks, BLEED the brake system. REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures). CYCLE the ignition from ON to OFF and back to ON. CARRY OUT the ABS module self-test. If this DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:8F	Brake Pressure Sensor "A": Erratic	DIAGNOSE DTC C0040:64 before diagnosing this DTC . If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:8F returns, VERIFY all ABS module-to- HCU fasteners are tightened to specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0051:28	Steering Wheel Position Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test K
C0051:62	Steering Wheel Position Sensor: Signal Compare Failure	GO to Pinpoint Test K
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	GO to Pinpoint Test K
C0051:67	Steering Wheel Position Sensor: Signal Incorrect After Event	GO to Pinpoint Test K
C0051:85	Steering Wheel Position Sensor: Signal Above Allowable Range	GO to Pinpoint Test K
C0061:28	Lateral Acceleration Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test G
C0061:2F	Lateral Acceleration Sensor: Signal Erratic	GO to Pinpoint Test G
C0061:64	Lateral Acceleration Sensor: Signal Plausibility Failure	GO to Pinpoint Test G
C0062:28	Longitudinal Acceleration Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test G
C0062:54	Longitudinal Acceleration Sensor: Missing Calibration	This DTC sets if the stability sensors in the RCM have not been calibrated or the calibration has been lost. CARRY OUT the IVD Initialization routine, FOLLOW the diagnostic scan tool instructions. If the module fails the routine, VERIFY the RCM is installed correctly and the fasteners are tightened to specifications. REINSTALL the RCM or INSTALL new fasteners as necessary. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). If the RCM is OK, CARRY OUT the RCM self-test. RETRIEVE and RECORD any Diagnostic Trouble Codes (DTCs). REFER to: Airbag Supplemental Restraint System (SRS) (501-20 Supplemental Restraint System) . If the module passes the routine, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. CARRY OUT the ABS module self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0062:64	Longitudinal Acceleration Sensor: Signal Plausibility Failure	GO to Pinpoint Test G
C0062:76	Longitudinal Acceleration Sensor: Wrong Mounting Position	Due to the nature of the longitudinal acceleration sensor, the RCM must be installed in the correct orientation to the centerline of the vehicle. This DTC sets if the RCM has been installed in the wrong position. VERIFY the RCM is installed correctly and the fasteners are tightened to specifications. REINSTALL the RCM or INSTALL new fasteners as necessary. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). If the RCM is OK, CARRY OUT the RCM self-test. RETRIEVE and RECORD any Diagnostic Trouble Codes (DTCs). REFER to: Airbag Supplemental Restraint System (SRS) (501-20 Supplemental Restraint System) .
C0063:28	Yaw Rate Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	GO to Pinpoint Test G
C0063:2F	Yaw Rate Sensor: Signal Erratic	GO to Pinpoint Test G
C0063:64	Yaw Rate Sensor: Signal Plausibility Failure	GO to Pinpoint Test G
C006B:00	Stability System Active Too Long: No Sub Type Information	DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC C006B:00 If no other ABS module Diagnostic Trouble Codes (DTCs) are present, GO to Pinpoint Test O
C1020:00	Brake System Fill Not Complete: No Sub-Type Information	This DTC is pre-set in a new ABS module and HCU assembly and can only be cleared when the Brake System Service Bleed is successfully carried out. CARRY OUT the Brake System Service Bleed. REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures). FOLLOW the diagnostic scan tool instructions.
C1109:64	Vehicle Dynamics Control Switch: Signal Plausibility Failure	GO to Pinpoint Test P
C1137:64	Reverse Gear Switch: Signal Plausibility Failure	This DTC sets when the transmission gear selection message sent from the TCM does not match other inputs received by the ABS module. RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the TCM .
C1A08:1C	Pressure Sensor Supply: Circuit Voltage Out of Range	The brake system pressure sensor is supplied voltage by the ABS module. The ABS module monitors this output and sets this DTC when the voltage is out of range. DIAGNOSE DTC U3003:16 or U3003:17, before diagnosing C1A08:1C. If DTC U3003:16 or U3003:17 is not present, make sure all ABS module-to- HCU fasteners are tightened to their correct torque specifications. If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
P0942:46	Hydraulic Pressure Unit: Calibration / Parameter Memory Failure	The ABS module and HCU are serviced as an assembly and should not be swapped between different vehicles. This DTC sets when the identification data stored in the ABS module does not match the identification data from the HCU . Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration routine. CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
P0942:49	Hydraulic Pressure Unit: Internal Electronic Failure	The ABS module and HCU are serviced as an assembly and should not be swapped between different vehicles. This DTC sets when the identification data stored in the ABS module does not match the identification data from the HCU . Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration. CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
P193B:86	Throttle / Pedal Signal: Signal Invalid	This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PCM . REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing).
U0001:88	High Speed CAN Communication Bus: Bus Off	The module could not communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this DTC . VERIFY the integrity of the connectors and wiring. Refer to Wiring Diagrams Cell 14 for schematic and connector information. DIAGNOSE no HS-CAN communication, all modules are not responding. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U0028:88	Vehicle Communication Bus "A": Bus Off	GO to Pinpoint Test G
U0100:00	Lost Communication With ECM / PCM "A": No Sub Type Information	GO to Pinpoint Test I
U0131:00	Lost Communication With Power Steering Control Module: No Sub Type Information	GO to Pinpoint Test J
U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test D
U0151:00	Lost Communication With Restraints Control Module: No Sub Type Information	GO to Pinpoint Test G
U0300:51	Internal Control Module Software Incompatibility: Not Programmed	CHECK vehicle service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper flash programming procedures. If there have been recent service actions with the ABS module, REPEAT the programming procedure as directed by the diagnostic scan tool.
U0401:00	Invalid Data Received From ECM / PCM "A": No Sub Type Information	This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the PCM . REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing).
U0401:68	Invalid Data Received From ECM / PCM "A": Event Information	This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the PCM . REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing).
U0402:00	Invalid Data Received From TCM: No Sub Type Information	This DTC sets when the ABS module receives invalid network data from the TCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the TCM . REFER to: Automatic Transmission (307-01 Automatic Transmission - 6-Speed PowerShift Transmission – DPS6/6DCT250, Diagnosis and Testing).
U0402:68	Invalid Data Received From TCM: Event Information	This DTC sets when the ABS module receives invalid network data from the TCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the TCM . REFER to: Automatic Transmission (307-01 Automatic Transmission - 6-Speed PowerShift Transmission – DPS6/6DCT250, Diagnosis and Testing).
U0420:82	Invalid Data Received From Power Steering Control Module: Alive / Sequence Counter Incorrect / Not Updated	If DTC U0131:00 is present, DIAGNOSE DTC U0131:00 first. This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the PSCM . REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0420:86	Invalid Data Received From Power Steering Control Module: Signal Invalid	If DTC U0131:00 is present, DIAGNOSE DTC U0131:00 first. This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the PSCM . REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0422:00	Invalid Data Received From Body Control Module: No Sub Type Information	This DTC sets when the ABS module receives invalid network data from the BCM . The BCM communicates with the ABS module through the IPC . RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the IPC . REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). If there are no Diagnostic Trouble Codes (DTCs) in the IPC , RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCs) in the BCM . REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
U0452:86	Invalid Data Received From Restraints Control Module: Signal Invalid	GO to Pinpoint Test G
U2007:62	Valve(s): Signal Compare Failure	This DTC sets due to an internal failure of the ABS module or a calibration failure between the HCU and the ABS module. CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2024:51	Control Module Cal-Config Data: Not Programmed	This DTC is only present when a new ABS module is installed, the ABS module is flashed or the ABS module is reconfigured. Using a diagnostic scan tool, CONFIGURE the ABS module. FOLLOW all diagnostic scan tool instructions. REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation). Using a diagnostic scan tool, CARRY OUT the ABS module self-test to clear the DTC .
U2100:00	Initial Configuration Not Complete: No Sub Type Information	This DTC is pre-set in a new ABS module and clears automatically when the ABS module is configured correctly. CHECK the service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper PMI procedures. If there have been recent service actions with this module, REPEAT the PMI procedure using as-built data. If there have been no recent service actions, INSTALL a new ABS module and HCU assembly to correct the failure to retain the configuration data. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2200:00	Control Module Configuration Memory Corrupt: No Sub Type Information	CHECK the service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper PMI procedures. If there have been recent service actions with this module, REPEAT the PMI procedure as directed by the diagnostic scan tool. If there have been no recent service actions, INSTALL a new ABS module and HCU assembly to correct the failure to retain configuration data. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U3000:49	Control Module: Internal Electronic Failure	CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the ABS module self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs). If the DTC returns INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U3002:62	Vehicle Identification Number: Signal Compare Failure	GO to Pinpoint Test N
U3003:08	Battery Voltage: Bus Signal / Message Failure	This DTC sets when the HS-CAN is shorted together, shorted to ground, shorted to voltage or open. If DTC U3003:16 is present, DIAGNOSE DTC U3003:16 before diagnosing DTC U3003:08. If DTC U3003:16 is not present, REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	GO to Pinpoint Test A
U3003:17	Battery Voltage: Circuit Voltage Above Threshold	GO to Pinpoint Test F

DTC Chart: Powertrain Control Module (PCM)

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

PCM DTC Chart

DTC	Description	Action
P0557	Brake Booster Pressure Sensor Circuit Low	GO to Pinpoint Test Q
P0558	Brake Booster Pressure Sensor Circuit High	GO to Pinpoint Test Q
—	All other PCM Diagnostic Trouble Codes (DTCs)	REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing).

Symptom Chart(s)

Symptom Chart: Anti-Lock Brake System (ABS) and Stability Control

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart

Condition	Possible Sources	Actions
A module does not respond to the diagnostic scan tool	Fuse Wiring, terminals or connectors ABS module concern	REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
The brake warning indicator is always or never on	Low brake fluid level Brake fluid level sensor Parking brake applied Parking brake switch IPC concern ABS concern	RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the ABS Module DTC Chart If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
The ABS warning indicator is always or never on	IPC concern ABS concern	RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the ABS Module DTC Chart. If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
The stability / traction control indicator (sliding-car icon) is never or always on	IPC concern ABS concern	RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the ABS Module DTC Chart. If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
All 3 indicators (brake warning, ABS warning and stability / traction control) are illuminated	Diagnostic Trouble Codes (DTCs) present in the ABS module CAN concern Wiring, terminals or connectors	A loss of ignition voltage, battery voltage or module ground causes all 3 ABS related indicators to illuminate. Loss of battery voltage or module ground causes a loss of communication between the ABS module and all other modules as well as the diagnostic scan tool. A loss of ignition voltage causes a loss of communication only between the ABS module and the PCM . RETRIEVE and DIAGNOSE all ABS module Diagnostic Trouble Codes (DTCs). GO to the DTC Chart: ABS Module. If the ABS module does not communicate with the diagnostic scan tool, REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing). If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, INSPECT the ABS module ignition voltage circuit C135-35 and CJB fuse 22 (7.5A) for an open, short to ground or excessive voltage and REPAIR as necessary.
ABS false activation, ABS too sensitive, ABS activates on normal stop	Front or rear suspension concern	ELIMINATE the front and rear suspension as the cause of the problem. REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).
	RCM mounting	CONFIRM the RCM is mounted correctly. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
	Loose wheel speed sensor or excessive air gap	INSPECT wheel speed sensor for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. For front wheel speed sensors, REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation). For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation). REFER to: Rear Wheel Speed Sensor - 1.6L EcoBoost (132kW/180PS) – Sigma (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
	Parking brake shoes out of adjustment (dragging)	CHECK and if necessary, ADJUST the parking brake system. REFER to: Parking Brake Cable Adjustment (206-05 Parking Brake and Actuation, General Procedures). REFER to: Parking Brake Cable Adjustment - 1.6L EcoBoost (132kW/180PS) – Sigma (206-05 Parking Brake and Actuation, General Procedures).
The hill start assist system is inoperative, does not function correctly, cannot be enabled or cannot be disabled	CAN concern IPC concern PCM concern TCM concern RCM concern HCU concern ABS module concern	RETRIEVE and DIAGNOSE all Diagnostic Trouble Codes (DTCS) from the following modules in the following order: IPC , REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). PCM ; , REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing). or REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing). TCM , REFER to: Automatic Transmission (307-01 Automatic Transmission - 6-Speed PowerShift Transmission – DPS6/6DCT250, Diagnosis and Testing). RCM , REFER to: Airbag Supplemental Restraint System (SRS) (501-20 Supplemental Restraint System) . ABS module, GO to the DTC Chart: ABS Module.
The traction control system cannot be disabled — vehicles equipped with a 1.6L Ti-VCT engine	Refer to the Diagnostic Routine	GO to Pinpoint Test E
The traction control system cannot be disabled — vehicles equipped with a 1.6L GTDI engine	Refer to the Diagnostic Routine	GO to Pinpoint Test P

Pinpoint Test(s)

U3003:16

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The ABS module receives this voltage from the BJB and the CJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. The ABS module sets this DTC if there is excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module falls below 10 volts.

Possible Sources

Fuses
Wiring, terminals or connectors
Charging system concern
Battery
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
Make sure the vehicle battery terminals are tightened to correct specifications.
Make sure BJB fuses 1 (60A) and 9 (60A) are OK.
Make sure CJB fuse 22 (7.5A) is OK.

PINPOINT TEST A: U3003:16

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

A1 RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC U3003:16 still present?

Yes

GO to A2

No	The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.

A2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)

Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?

Yes

DIAGNOSE the vehicle charging concern,
REFER to: Charging System - 1.6L EcoBoost (132kW/180PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing).
REFER to: Charging System - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing).

GO to A3

A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

Carry out the Battery Condition Test.
REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the condition test?

Yes

If the battery passed the condition test but required a recharge, DIAGNOSE the charging system.
REFER to: Charging System - 1.6L EcoBoost (132kW/180PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing).
REFER to: Charging System - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing). If the battery passed the condition test and did not require a recharge, GO to A4

No	INSTALL a new battery. REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

A4 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE (VPWR_ABS) PID (PARAMETER IDENTIFICATION)

Ignition ON.

Measure and record the voltage at the battery.

Using a diagnostic scan tool, monitor the VPWR_ABS PID .

Is the PID display within 0.2 volt of the recorded battery voltage?

Yes

GO to A7

GO to A5

A5 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE SUPPLY

Ignition OFF.

Disconnect ABS module C135.

Ignition ON.

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C135-1		Ground
C135-30		Ground
C135-35		Ground

Is each voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to A6

No	VERIFY BJB fuses 1 (60A) and 9 (60A) are OK. VERIFY CJB fuse 22 (7.5A) is OK. If OK, REPAIR the affected circuit for high resistance or an open. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A6 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect the battery negative cable.
REFER to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-14 Ground

Is the resistance less than 3 ohms?

Yes

GO to A7

No	REPAIR the circuit.

A7 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135 (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect the battery negative cable.
REFER to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Wheel Speed Sensor Erratic Signal DTCs

Normal Operation and Fault Conditions

The wheel speed sensor and encoder (tone wheel) generate a square wave signal proportional to wheel speed and sends this information to the ABS module. The wheel bearing, encoder and wheel speed sensor must be undamaged and free from contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0030:07, C0033:07, C0036:07, C0039:07	Tone Wheel: Mechanical Failure	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal.
C0031:07, C0034:07, C0037:07, C003A:07	Wheel Speed Sensor: Mechanical Failure	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor, encoder or wheel bearing is damaged, or if the wheel bearing is not installed correctly. These Diagnostic Trouble Codes (DTCs) also set if an incorrectly sized tire is installed on the vehicle or if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed.
C0031:29, C0034:29, C0037:29, C003A:29	Wheel Speed Sensor: Signal Invalid	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the tone wheel is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bi-directional versus uni-directional) or if the tire size is incorrect for the vehicle.
C0031:2F, C0034:2F, C0037:2F, C003A:2F	Wheel Speed Sensor: Signal Erratic	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the tone wheel is missing or damaged, if there is an excessive gap between the sensor and tone ring or high frequency interference.
C0031:64, C0034:64, C0037:64, C003A:64	Wheel Speed Sensor: Signal Plausibility Failure	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the tone wheel is missing or damaged, if there is an excessive gap between the sensor and tone ring, if the wrong sensor is installed (bi-directional versus uni-directional) or if the tire size is incorrect for the vehicle.

Possible Sources

Wiring, terminals or connectors
Tire size
Tire pressure
Wheel speed sensor
Wheel speed sensor encoder
Wheel bearing
ABS module

PINPOINT TEST B: WHEEL SPEED SENSOR ERRATIC SIGNAL DTCS

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

B1 CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Is DTC C003x:29 or C003x:64 present?

Yes

GO to B2

No	If DTC C0031:07, C0034:07, C0037:07 or C003A:07 is present, GO to B3 If DTC C0031:2F, C0034:2F, C0037:2F or C0039:2F is present, GO to B3 If DTC C0030:07, C0033:07, C0036:07 or C0039:07 is present, GO to B6 For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the ABS Module DTC Chart.

B2 CHECK THE TIRE SIZE AND PRESSURE

Ignition OFF.

Verify that all the tires and wheels are the same size and the tire size and inflation pressures are correct as indicated on the VC label.

Are the tires and wheels OK?

Yes

GO to B3

No	INSTALL the correct size tire or wheel or ADJUST tire pressure as necessary.

B3 CHECK THE WHEEL SPEED SENSOR MOUNTING

With the vehicle in NEUTRAL, position it on a hoist.
REFER to: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

Inspect the wheel speed sensor for correct installation and the fastener for looseness.

Is the wheel speed sensor installed correctly and the fastener tightened to specifications?

Yes

GO to B5

REINSTALL the wheel speed sensor and tighten the fastener to specifications. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
REFER to: Rear Wheel Speed Sensor - 1.6L EcoBoost (132kW/180PS) – Sigma (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
GO to B4

B4 CHECK THE WHEEL SPEED SENSOR PARAMETER IDENTIFICATIONS (PIDS)

Ignition ON.

Using a diagnostic scan tool, access the ABS module Parameter Identifications (PIDs).

Drive the vehicle at a speed greater than 20 km/h (12 mph) while recording the following Parameter Identifications (PIDs):
- Left front wheel speed sensor (LF_WSPD)
- Right front wheel speed sensor (RF_WSPD)
- Left rear wheel speed sensor (LR_WSPD)
- Right rear wheel speed sensor (RR_WSPD)

Are the wheel speed Parameter Identifications (PIDs) within 5 km/h (3 mph) of each other and the vehicle speed as indicated on the speedometer?

Yes

The system is operating correctly at this time. The concern may have been caused by a loose or incorrectly installed wheel speed sensor.

GO to B5

B5 CHECK THE WHEEL SPEED SENSOR FOR DAMAGE

Ignition OFF.

With the vehicle in NEUTRAL, position it on a hoist.
REFER to: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

Disconnect the suspect wheel speed sensor electrical connector.

Inspect the wheel speed sensor and harness for abrasions, broken connector tabs or water intrusion.

Is the wheel speed sensor and harness OK?

Yes

GO to B6

INSTALL a new wheel speed sensor. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
REFER to: Rear Wheel Speed Sensor - 1.6L EcoBoost (132kW/180PS) – Sigma (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

B6 CHECK WHEEL BEARING AND ENCODER FOR DAMAGE

Remove the suspect wheel speed sensor.
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
REFER to: Rear Wheel Speed Sensor - 1.6L EcoBoost (132kW/180PS) – Sigma (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

Inspect the wheel bearing for abnormal wear or roughness and for deformation or contamination of the seal and encoder.

Are the wheel bearing and encoder OK?

Yes

GO to B7

INSTALL a new wheel bearing as necessary. REFER to: Front Wheel Bearing (204-01 Front Suspension, Removal and Installation).
REFER to: Wheel Bearing and Wheel Hub (204-02 Rear Suspension, Removal and Installation).
REFER to: Rear Wheel Bearing - 1.6L EcoBoost (132kW/180PS) – Sigma (204-02 Rear Suspension, Removal and Installation).

B7 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

Disconnect the suspect wheel speed sensor electrical connector.

Ignition ON.

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C150-1 C150-2

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C160-1 C160-2

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C440-1 C440-2

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C426-1 C426-2

Is the voltage greater than 11 volts?

Yes

GO to B8

B8 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135.

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect the suspect wheel speed sensor electrical connector. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

C0040:64

Refer to Wiring Diagrams Cell 31 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module receives BPP switch (also known as stoplamp switch) input from the PCM over the HS-CAN . The ABS module compares this information against wheel speed sensor input to determine if the BPP switch input is valid. As vehicle speed decreases, the ABS module looks for a change in the BPP switch input, if vehicle speed decreases but there is no change in the BPP switch, the ABS module sets a DTC . A BPP switch that is incorrectly installed can cause a signal plausibility concern. An implausible signal can also be created if a driver is resting one foot on the brake pedal while using the other foot to press the accelerator.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0040:64	Brake Pedal Switch "A": Signal Plausibility Failure	This DTC sets in continuous memory if BPP switch input is continuously active for more than 6 minutes when driving faster than 20 km/h (12 mph) or after accelerating up to a speed greater than 40 km/h (24 mph) and decelerating down to a speed less than 3 km/h (2 mph) 4 times with no change in BPP switch input.

Possible Sources

Wiring, terminals or connectors
BPP switch
CAN concern
PCM

Visual Inspection and Diagnostic Pre-checks

Make sure the BPP switch electrical connector is connected and free of corrosion and other contaminants.
Make sure the BPP switch is installed correctly.
Make sure the BPP switch is operating correctly.

PINPOINT TEST C: C0040:64

C1 CHECK THE BPP (BRAKE PEDAL POSITION) SWITCH INSTALLATION

Verify the BPP switch is installed correctly.
REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing).

Is the BPP switch correctly installed?

Yes

GO to C2

No	REINSTALL the BPP switch. REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing).

C2 CHECK THE PCM (POWERTRAIN CONTROL MODULE) BPP (BRAKE PEDAL POSITION) (BOO1) PID (PARAMETER IDENTIFICATION)

Ignition ON.

Using a diagnostic scan tool, monitor the PCM BOO1 PID while pressing and releasing the brake pedal.

Does the PID display match the movement of the brake pedal?

Yes

GO to C3

No	DIAGNOSE the BPP switch. REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing).

C3 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE BRAKE ON/OFF (BOO_ABS) PID (PARAMETER IDENTIFICATION)

Using a diagnostic scan tool, monitor the ABS module BOO_ABS PID while pressing and releasing the brake pedal.

Does the PID display match the movement of the brake pedal?

Yes

The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

GO to C4

C4 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any communication (U-code) Diagnostic Trouble Codes (DTCs) present?

Yes

GO to the ABS Module Chart.

GO to C5

C5 CHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the PCM KOEO self-test.

Retrieve and record all PCM Diagnostic Trouble Codes (DTCs).

Are any PCM Diagnostic Trouble Codes (DTCs) present?

Yes

DIAGNOSE the PCM Diagnostic Trouble Codes (DTCs).
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) – Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma, Diagnosis and Testing).

GO to C6

C6 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135.

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

U0140:00

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the BCM sends messages to the ABS module over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the BCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0140:00	Lost Communication With Body Control Module: No Sub Type Information	This DTC sets in continuous memory and on-demand in the ABS module if any one of the following messages is missing from the BCM ; odometer value, parking brake status, vehicle mode or vehicle configuration information.

Possible Sources

Network communication concern
BCM
ABS module

PINPOINT TEST D: U0140:00

D1 CHECK THE COMMUNICATION NETWORK

Ignition ON.

Using a diagnostic scan tool, carry out the Network Test.

Does the BCM pass the Network Test?

Yes

GO to D2

No	DIAGNOSE the no communication with the BCM . REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

D2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE FOR CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

Ignition ON.

Repeat the ABS module self-test.

Is DTC U0140:00 retrieved again?

Yes

GO to D3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

D3 REVIEW THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST

Review the recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Is DTC U3003:16 or U3003:17 recorded in the ABS module?

Yes

For ABS module DTC U3003:16, GO to Pinpoint Test A
For ABS module DTC U3003:17, GO to Pinpoint Test F

GO to D4

D4 RETRIEVE ANY BCM (BODY CONTROL MODULE) SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the BCM self-test.

Retrieve and record the Diagnostic Trouble Codes (DTCs) from the BCM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes

DIAGNOSE the BCM Diagnostic Trouble Codes (DTCs).
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

GO to D5

D5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0140:00 SET IN OTHER MODULES

Using the diagnostic scan tool, carry out the self-test for all modules.

Retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in 1 or more modules in addition to the ABS module?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.
If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU .
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

The Traction Control System Cannot Be Disabled — Vehicles Equipped With A 1.6L Ti-VCT Engine

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The stability / traction control OFF indicator (sliding car OFF icon) in the IPC provides traction control system status to the driver. When the driver deactivates the traction control through the message center, the IPC sends a message to the ABS module over the HS-CAN . Once the message is received, the ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

When the traction control system is deactivated, the ABS module sends a message to the IPC over the HS-CAN to illuminate the stability / traction control disabled indicator (sliding car OFF icon). The IPC responds by illuminating the stability / traction control disabled indicator (sliding car OFF icon). The traction control system remains deactivated until the driver changes the traction control state or until the ignition is cycled.

If equipped, MyKey® allows users to configure traction control to be either always on or selectable. If a MyKey® restricted key is in use with the AdvanceTrac® always on feature configured to on, the traction control system cannot be disabled. An admin key must be used to enable and disable the traction control system.

Possible Sources

MyKey® restricted key in use
Network communication concern
Message center concern
IPC concern
BCM concern

NOTE: For vehicles equipped with push-button start, this test requires the use of at least 2 passive keys programmed to the vehicle, one admin passive key and one restricted passive key.

NOTE: For vehicles not equipped with push-button start, this test requires the use of at least 2 IKT s programmed to the vehicle, one admin IKT and one restricted IKT .

PINPOINT TEST E: THE TRACTION CONTROL SYSTEM CANNOT BE DISABLED — VEHICLES EQUIPPED WITH A 1.6L TI-VCT ENGINE

E1 VERIFY THAT THE KEY IN USE IS NOT RESTRICTED

For vehicles equipped with push-button start,
- place 1 passive key inside the vehicle and all other passive keys at least 1 meter (3 feet) away from the vehicle.
- press the start button without pressing the brake pedal.

For vehicles not equipped with push-button start, turn the ignition to the ON position.

Monitor the message center.

Does the message center display MYKEY ACTIVE DRIVE SAFELY?

Yes

The current passive key or IKT is a restricted key and is functioning correctly.
REPEAT the test using different passive keys or IKT s until the message center does not display MYKEY ACTIVE DRIVE SAFELY. GO to E2

GO to E2

E2 VERIFY THE MYKEY® TRACTION CONTROL SETTING

Using the message center, verify the MyKey® traction control setting. Refer to the Owner's Literature for information on setting the MyKey® functions.

Is the MyKey® traction control setting configured to always on?

Yes

GO to E3

GO to E4

E3 VERIFY THE TRACTION CONTROL FUNCTION CAN BE DISABLED USING THE ADMIN PASSIVE KEY OR ADMIN IKT (INTEGRATED KEYHEAD TRANSMITTER)

Using the message center, verify the traction control function can be enabled and disabled using the admin passive key or admin IKT . Refer to the Owner's Literature for information on enabling and disabling the traction control function.

Can the traction control function be enabled and disabled using the admin passive key or admin IKT ?

Yes

The system is operating correctly at this time. The concern was most likely caused by the use of a restricted passive key or restricted IKT .
INFORM the customer the traction control function can only be disabled using an admin passive key or admin IKT when the MyKey® traction control setting is configured to always on.

GO to E4

E4 CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) present in the ABS module?

Yes

GO to the ABS Module DTC Chart.

GO to E5

E5 CHECK FOR IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the IPC self-test.

Retrieve and record all IPC Diagnostic Trouble Codes (DTCs).

Are there any IPC Diagnostic Trouble Codes (DTCs) present?

Yes

GO to the IPC DTC Chart.
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).

GO to E6

E6 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the BCM self-test.

Retrieve and record all BCM Diagnostic Trouble Codes (DTCs).

Are there any BCM Diagnostic Trouble Codes (DTCs) present?

Yes

GO to the BCM DTC Chart.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

No	The system is operating correctly at this time. The concern may have been caused due to high network traffic or an intermittent fault condition.

U3003:17

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The ABS module receives this voltage from the BJB and the CJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. An overcharging condition in the charging system results in the ABS module setting a DTC . This DTC may also set in the ABS module due to battery charging or vehicle jump starting events.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3003:17	Battery Voltage: Circuit Voltage Above Threshold	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is above 17 volts.

Possible Sources

Charging system concern
ABS module

PINPOINT TEST F: U3003:17

F1 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES

Ignition ON.

Using a diagnostic scan tool, retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?

Yes

DIAGNOSE the overcharging condition.
REFER to: Charging System - 1.6L EcoBoost (132kW/180PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing).
REFER to: Charging System - 1.6L Duratec-16V Ti-VCT (88kW/120PS) – Sigma (414-00 Charging System - General Information, Diagnosis and Testing).

GO to F2

F2 CHECK THE BATTERY VOLTAGE

Turn off all interior lights, exterior lights and accessories.

Start and run the engine at approximately 1,500 Revolutions Per Minute (RPM) for 3 minutes while monitoring the battery voltage.

Is the battery voltage between 13 and 15.2 volts ?

Yes

GO to F3

F3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

Turn the engine off.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Clear the ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Repeat the ABS module self-test.

Is DTC U3003:17 still present?

Yes

GO to F4

No	The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

F4 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135 (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Stability Control Sensor Signal Failure DTCs

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module receives vehicle yaw rate, lateral acceleration and longitudinal acceleration information from the RCM over a private HS-CAN . This private HS-CAN is used only for communication between the RCM and the ABS module. The yaw rate sensor, lateral and longitudinal accelerometers are contained in the RCM . A failure of the private HS-CAN , RCM or the internal sensors will cause the ABS to set one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0061:28, C0062:28, C0063:28	Lateral Acceleration, Longitudinal Acceleration, Yaw Rate: Signal Bias Level Out of Range / Zero Adjustment Failure	This DTC sets in continuous memory and on-demand if the sensor signal is greater than the programmed sensor maximum plausible signal.
C0061:2F, C0063:2F	Lateral Acceleration, Yaw Rate Sensor: Signal Erratic	This DTC sets in continuous memory and on-demand if the sensor signal is out of range when the vehicle is standing still.
C0061:64, C0062:64, C0063:64	Lateral Acceleration, Longitudinal Acceleration, Yaw Rate: Signal Plausibility Failure	This DTC sets in continuous memory and on-demand if the lateral acceleration sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration, etc.).
U0028:88	Vehicle Communication Bus "A": Bus Off	This DTC sets in continuous memory and on-demand due to a circuit failure in the private HS-CAN between the ABS module and the RCM .
U0151:00	Lost Communication With Restraints Control Module: No Sub Type Information	This DTC sets in continuous memory and on-demand if the expected RCM messages such as yaw rate sensor, lateral and longitudinal accelerometers are missing for more than 5 seconds.
U0452:86	Invalid Data Received from Restraints Control Module: Signal Invalid	This DTC sets in continuous memory and on-demand if one or more of the stability sensors inside the RCM fails and the sensor signal provided does not match other vehicle dynamic sensor input.

Possible Sources

Wiring, terminals or connectors
RCM
ABS module

PINPOINT TEST G: STABILITY CONTROL SENSOR SIGNAL FAILURE DTCS

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

G1 CHECK THE COMMUNICATION NETWORK

Ignition ON.

Using the diagnostic scan tool, carry out the Network Test.

Does the RCM pass the Network Test?

Yes

GO to G2

No	DIAGNOSE the RCM does not communicate with the diagnostic scan tool. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

G2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

Ignition ON.

Repeat the ABS module self-test.

Is DTC U0151:00 retrieved again?

Yes

GO to G3

For Diagnostic Trouble Codes (DTCs) C0061:28, 2F, 64; C0062:28, 64; C0063:28, 2F, 64; U0028:88 or U0452:86, GO to G7
For all other Diagnostic Trouble Codes (DTCs), GO to the ABS Module DTC Chart.
If no Diagnostic Trouble Codes (DTCs) return, the system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

G3 REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Review the recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Is DTC U3003:16 or U3003:17 recorded in the ABS module?

Yes

For ABS module DTC U3003:16, GO to Pinpoint Test A
For ABS module DTC U3003:17, GO to Pinpoint Test F

GO to G4

G4 RETRIEVE ANY RCM (RESTRAINTS CONTROL MODULE) SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the RCM self-test.

Is DTC U3003:16 or U3003:17 recorded in the RCM ?

Yes

REFER to: Airbag Supplemental Restraint System (SRS) (501-20 Supplemental Restraint System) .

GO to G5

G5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0151:00 SET IN OTHER MODULES

Using the diagnostic scan tool, carry out the self-test for all modules.

Retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0151:00 recorded in 1 or more modules in addition to the ABS module?

Yes

GO to G13

GO to G6

G6 VERIFY THE RCM (RESTRAINTS CONTROL MODULE) PART NUMBER

Using a diagnostic scan tool, retrieve and record the RCM part number.

Check the part number recorded against the number listed in the parts catalog or equivalent.

Does the part number on the RCM match the part number listed in the parts catalog?

Yes

GO to G7

No	INSTALL the correct RCM . REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).

G7 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) CALIBRATION ROUTINE

Using a diagnostic scan tool, carry out the IVD Initialization routine. Follow the diagnostic scan tool instructions.

Does the ABS module IVD Initialization complete successfully?

Yes

GO to G8

GO to G9

G8 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Are any stability control sensor Diagnostic Trouble Codes (DTCs), including no communication, invalid data and bus off Diagnostic Trouble Codes (DTCs) present?

Yes

GO to G9

No	The condition that set the DTC is not present at this time. The concern may have been caused due to a failed or an incomplete initialization.

G9 CHECK THE PRIVATE HS-CAN (HIGH-SPEED CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TO VOLTAGE

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Ignition must remain OFF until repair is complete. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

Ignition OFF and wait one minute.

Disconnect RCM C310A and C310B.

Disconnect ABS module C135.

Ignition ON.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-32 Ground

C135-33 Ground

Is any voltage present?

Yes

REPAIR the circuit.
Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

GO to G10

G10 CHECK THE PRIVATE HS-CAN (HIGH-SPEED CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-32 Ground

C135-33 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to G11

No	REPAIR the circuit. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

G11 CHECK THE PRIVATE HS-CAN (HIGH-SPEED CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TOGETHER

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-32 C135-33

Is the resistance greater than 10,000 ohms?

Yes

GO to G12

No	REPAIR the circuit. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

G12 CHECK THE PRIVATE HS-CAN (HIGH-SPEED CONTROLLER AREA NETWORK) CIRCUITS FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-32 C310B-60

C135-33 C310B-59

Are the resistances less than 3 ohms?

Yes

GO to G13

No	REPAIR the circuit. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

G13 CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect RCM C310A and C310B (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect RCM C310A and C310B. Make sure the connectors seat and latch correctly.

Connect ABS module C135 (if previously disconnected). Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

C0020:13, C0020:71

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses an internal solid state switch to operate the hydraulic pump motor. The ABS module tests the hydraulic pump motor by activating it for 30 milliseconds. The ABS module monitors the voltage drop across the hydraulic pump motor while is being activated. After 30 milliseconds have passed, the ABS module stops applying voltage to the pump motor and monitors the voltage the spinning hydraulic pump motor is generating and the voltage drop across the hydraulic pump motor solid state switch. If the monitored voltages are not within the specifications, the ABS module sets one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0020:13	ABS Pump Motor Control: Circuit Open	This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is less than 10 volts, if there is an open or high resistance on the ABS pump motor circuit between the ABS module and the HCU , or if the ABS module is faulted internally.
C0020:71	ABS Pump Motor Control: Actuator Stuck	This DTC sets in continuous memory and on-demand if the ABS module detects the hydraulic pump motor is not rotating when it is commanded to run.

Possible Sources

Fuse
Wiring, terminals or connectors
HCU
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
Make sure the vehicle battery terminals are tightened to correct specifications.
Make sure BJB fuse 1 (60A) and the fuse socket are OK.

PINPOINT TEST H: C0020:13, C0020:71

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

H1 VERIFY ALL WIRING CONNECTIONS

Ignition OFF.

Disconnect ABS module C135.

Using a good light source, inspect each connector terminal for any corrosion.

Inspect the connector for any pushed-out terminals.

Using a suitable mating terminal, check each connector terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
- C135-1
- C135-14

Is the connector free of terminal corrosion, pushed-out terminals and spread terminals?

Yes

GO to H2

No	REPAIR the affected terminal(s). Refer to Wiring Diagrams Cell 5 for schematic and connector information.

H2 CHECK PUMP MOTOR OPERATION

Connect ABS module C135.

Ignition ON.

Using a diagnostic scan tool, activate the ABS pump motor (PMP_MTR) active command.

Listen for the ABS pump motor noise.

Does the ABS pump motor run for approximately 2 seconds?

Yes

GO to H3

GO to H4

H3 CHECK FOR FAULT REPEATABILITY

Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Test drive the vehicle at speeds greater than 20 km/h (12 mph).

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any ABS module Diagnostic Trouble Codes (DTCs) retrieved?

Yes

For DTC C0020:13 and 71, GO to H6
For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the ABS Module DTC Chart.

No	The concern that caused the DTC is not present at this time. DISCONNECT and INSPECT ABS module C135. CLEAR or REPAIR the connector as necessary. ADDRESS the root cause of any connector or pin issues.

H4 CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE

Ignition OFF.

Disconnect ABS module C135.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-1 Ground

Is the voltage greater than 11 volts?

Yes

GO to H5

No	VERIFY that BJB fuse 1 (60A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

H5 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect the battery negative cable.
REFER to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-14 Ground

Is the resistance less than 3 ohms?

Yes

GO to H6

No	REPAIR the circuit.

H6 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135 (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect the battery negative cable.
REFER to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

U0100:00

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the ABS module over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the PCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0100:00	Lost Communication With ECM / PCM "A": No Sub Type Information	This DTC sets in continuous memory and on-demand when the gear lever position message, brake pedal position message, driven wheel torque message or accelerator pedal position message from the PCM is missing. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network.

Possible Sources

Wiring, terminals or connectors
Network communication concern
PCM

PINPOINT TEST I: U0100:00

I1 CHECK THE COMMUNICATION NETWORK

Ignition ON.

Using a diagnostic scan tool, carry out the Network Test.

Does the PCM pass the Network Test?

Yes

GO to I2

No	DIAGNOSE the no communication with the PCM . REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

I2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, carry out the ABS module self-test.

Clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Record the ABS module Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC U0100:00 retrieved again?

Yes

GO to I3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

I3 REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Review the recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes

For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F

GO to I4

I4 RETRIEVE THE RECORDED PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the PCM KOEO self-test.

Is DTC P0562 or P0563 present?

Yes

GO to I5

I5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:XX SET IN OTHER MODULES

Using a diagnostic scan tool, carry out the self-test for all modules.

Retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0100:xx set in 1 or more modules in addition to the ABS module?

Yes

Click here to access Guided Routine (PCM).

U0131:00

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (less than 1 second), the ABS module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the PSCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0131:00	Lost Communication With Power Steering Control Module: No Sub Type Information	This DTC sets in continuous memory and on-demand if either the steering angle count or the steering angle status message is missing. This can be due to a steering angle sensor failure, a circuit failure on the HS-CAN or an excessive load on the network.

Possible Sources

Network communication concern
PSCM
ABS module

PINPOINT TEST J: U0131:00

J1 CHECK THE COMMUNICATION NETWORK

Ignition ON.

Using a diagnostic scan tool, carry out the Network Test.

Does the PSCM pass the Network Test?

Yes

GO to J2

No	DIAGNOSE the communication with the PSCM . REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

J2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record the ABS module Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC U0131:00 retrieved again?

Yes

GO to J3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

J3 REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Review the recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes

For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F

GO to J4

J4 RETRIEVE THE RECORDED PSCM (POWER STEERING CONTROL MODULE) SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the PSCM self-test.

Are there any battery voltage Diagnostic Trouble Codes (DTCs) present in the PSCM ?

Yes

DIAGNOSE the PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).

GO to J5

J5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0131:00 SET IN OTHER MODULES

Using a diagnostic scan tool, carry out the self-test for all modules.

Retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0131:00 set in 1 or more modules in addition to the ABS module?

Yes

Click here to access Guided Routine (EPAS).

Steering Wheel Position Sensor Signal Failure Diagnostic Trouble Codes (DTCs)

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The PSCM monitors steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the HS-CAN . A failure of the HS-CAN or the PSCM causes the ABS to set one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0051:28	Steering Wheel Position Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure	The steering wheel angle signal has a calculated offset used to compensate for vehicle tracking, vehicle suspension and sensor mounting. This DTC sets in continuous memory and on-demand if the value of the calculated steering wheel angle offset is greater than 15 degrees. This is most likely caused by loose or worn steering or suspension components that result in a vehicle tracking, pull or drift issue.
C0051:62	Steering Wheel Position Sensor: Signal Compare Failure	This DTC sets in continuous memory and on-demand if the difference between the steering wheel angle signal and the calculated reference signal is too high. This is most likely caused by a vehicle alignment concern or an incorrectly mounted steering wheel position sensor.
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	The PSCM uses 2 steering angle sensors to determine angle, speed and direction of steering wheel rotation. This DTC sets in continuous memory and on-demand if the difference between the steering wheel position signal and the calculated reference signal is too high or if one steering wheel position sensor shows steering wheel movement while the other sensor does not. This is most likely caused by a vehicle alignment concern or a failure of one or both steering wheel position sensors.
C0051:67	Steering Wheel Position Sensor: Signal Incorrect After Event	This DTC sets in continuous memory and on-demand when the steering wheel center position cannot be determined after 30 seconds of driving at speeds between 12.6 km/h (8 mph) and 50 km/h (31 mph) or after 3 seconds of driving at speeds above 50 km/h (31 mph). This DTC does not necessarily indicate a concern in the ABS or EPAS system. The steering wheel center position detection may be delayed due to road conditions, vehicle maneuvers, incorrect or faulty yaw rate, lateral acceleration or wheel speed sensor information.
C0051:85	Steering Wheel Position Sensor: Signal Above Allowable Range	This DTC sets in continuous memory and on-demand if the absolute value of the calculated steering wheel angle is greater than a predetermined threshold. This is most likely caused by a vehicle alignment concerns or a failure of the steering wheel position sensors.

Possible Sources

HS-CAN concern
ABS wheel speed sensor concern
Incomplete or incorrect EPAS system calibration
Wheels and tires
Front suspension components
Steering system components
Incorrectly installed RCM
Steering wheel position sensor (also known as the steering torque sensor, part of the EPAS column)

PINPOINT TEST K: STEERING WHEEL POSITION SENSOR SIGNAL FAILURE DIAGNOSTIC TROUBLE CODES (DTCS)

K1 CHECK FOR PSCM (POWER STEERING CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the PSCM self-test.

Are there any Diagnostic Trouble Codes (DTCs) present in the PSCM ?

Yes

DIAGNOSE all PSCM Diagnostic Trouble Codes (DTCs) before diagnosing any ABS module C0051:xx Diagnostic Trouble Codes (DTCs). REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).

GO to K2

K2 CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the ABS module self-test.

Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are there any other ABS module Diagnostic Trouble Codes (DTCs) present in addition to C0051:28, C0051:62, C0051:64, C0051:67 or C0051:85?

Yes

DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs) diagnosing Diagnostic Trouble Codes (DTCs) C0051:28, C0051:62, C0051:64, C0051:67 or C0051:85.
GO to the ABS Module DTC Chart.

No	For Diagnostic Trouble Codes (DTCs) C0051:28, C0051:62, C0051:64, C0051:67 or C0051:85, GO to K3

K3 VERIFY EPAS (ELECTRONIC POWER ASSIST STEERING) CALIBRATION

Start the engine.

Turn the steering wheel approximately 30 degrees in each direction, then return to the center position. Make sure the steering wheel is set to the straight ahead position.

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the steering angle sensor calibration procedure.
- Refer to Programmable Parameters / Steering Wheel Position Sensor Calibration in the diagnostic scan tool and follow the calibration procedure.

Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Wait 90 seconds for the PSCM to exit the active state.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0051:28, C0051:62, C0051:67 or C0051:85 present?

Yes

GO to K4

No	The condition that caused the concern is no longer present. The concern was most likely due to an incomplete calibration or a failed calibration of the EPAS system.

K4 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) WHEEL SPEED SENSOR PARAMETER IDENTIFICATIONS (PIDS)

Using a diagnostic scan tool, access the ABS module Parameter Identifications (PIDs).

Drive the vehicle at a speed greater than 20 km/h (12 mph) while recording the following Parameter Identifications (PIDs):
- Left front wheel speed sensor (LF_WSPD)
- Right front wheel speed sensor (RF_WSPD)
- Left rear wheel speed sensor (LR_WSPD)
- Right rear wheel speed sensor (RR_WSPD)

Are the wheel speed Parameter Identifications (PIDs) within 5 km/h (3 mph) of each other and the vehicle speed as indicated on the speedometer?

Yes

GO to K5

No	GO to Pinpoint Test B

K5 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE YAW RATE VALUE (YAW_RATE) PID (PARAMETER IDENTIFICATION)

Ignition ON.

Using a diagnostic scan tool, monitor the ABS module YAW_RATE PID .

Is the YAW_RATE PID value between -0.05 and 0.05?

Yes

GO to K6

GO to K8

K6 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LATERAL ACCELERATION (LAT_ACCL) PID (PARAMETER IDENTIFICATION)

Using a diagnostic scan tool, monitor the ABS module LAT_ACCL PID .

Is the LAT_ACCL PID value between -0.4 and 0.4?

Yes

GO to K7

GO to K8

K7 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LONGITUDINAL ACCELERATION (LONG_ACCL) PID (PARAMETER IDENTIFICATION)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false readings for this test.

Using a diagnostic scan tool, monitor the ABS module LONG_ACCL PID .

Is the LONG_ACCL PID value between -0.4 and 0.4?

Yes

GO to K9

GO to K8

K8 CHECK THE RCM (RESTRAINTS CONTROL MODULE) INSTALLATION AND MOUNTING SURFACE

Ignition OFF and wait one minute.

Disconnect RCM C310A and C310B.

Inspect the RCM installation and make sure the fasteners are fully seated and tightened correctly.
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).

Inspect the RCM mounting surface for damage, corrosion or dirt.

Is the RCM installed correctly and is the mounting surface clean and free from damage?

Yes

GO to K9

No	REPAIR or INSTALL new as necessary. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

K9 CHECK FOR CORRECT PSCM (POWER STEERING CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PSCM electrical connectors (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect all PSCM electrical connectors. Make sure the connector seats and latches correctly.

Connect all RCM electrical connectors (if previously disconnected). Make sure the connectors seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

Click here to access Guided Routine (EPAS).
Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

Wheel Speed Sensor Electrical Fault DTCs - Front

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. One wire is for sensor voltage supply from the ABS module and the other wire is for the signal return to the ABS module. With the ignition ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0031:11	Left Front Wheel Speed Sensor: Circuit Short to Ground	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground.
C0034:11	Right Front Wheel Speed Sensor: Circuit Short to Ground
C0031:15	Left Front Wheel Speed Sensor: Circuit Short to Battery or Open	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These Diagnostic Trouble Codes (DTCs) also set if the sensor has an internal short to battery voltage or an open circuit.
C0034:15	Right Front Wheel Speed Sensor: Circuit Short to Battery or Open

Possible Sources

Wiring, terminals or connectors
Wheel speed sensors
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the wheel speed sensor harness is routed correctly and is undamaged.
Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.

PINPOINT TEST L: WHEEL SPEED SENSOR ELECTRICAL FAULT DTCS - FRONT

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

L1 CHECK FOR FAULT REPEATABILITY

Ignition ON.

Using a diagnostic scan tool, clear all ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Test drive the vehicle above 20 km/h (12 mph).

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0031:11, C0031:15, C0034:11 or C0034:15 present?

Yes

If the Rotunda Active Wheel Speed Sensor Tester is available, GO to L2
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0031:15 or C0034:15 is present, GO to L5
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0031:11 or C0034:11 is present, GO to L7

No	The system is operating correctly at this time. INSPECT both front wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

L2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Ignition OFF.

Disconnect the suspect wheel speed sensor electrical connector.

Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.

Ignition ON.

Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.

Is the tester output LED illuminated?

Yes

GO to L3

GO to L5

L3 CHECK THE WHEEL SPEED SENSOR FOR A SHORT TO VOLTAGE WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Observe the current overload LED on the Rotunda Active Wheel Speed Sensor Tester.

Is the current overload LED illuminated?

Yes

REPAIR the suspect wheel speed sensor circuit for a short to voltage.

GO to L4

L4 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Raise the suspect wheel until it can spin freely.
REFER to: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

While monitoring the Rotunda Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.

Do the sensor output Light-emitting Diodes (LEDs) illuminate and flash?

Yes

The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

No	INSTALL a new wheel speed sensor. REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

L5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

Ignition OFF.

Disconnect ABS module C135.

Disconnect wheel speed sensor C150 or C160.

Ignition ON.

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-8 Ground

C135-9 Ground

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-4 Ground

C135-5 Ground

Is any voltage present?

Yes

REPAIR the circuit.

GO to L6

L6 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN

Ignition OFF.

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-8 C150-2

C135-9 C150-1

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-4 C160-2

C135-5 C160-1

Are the resistances less than 3 ohms?

Yes

GO to L7

No	REPAIR the circuit.

L7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS

Ignition OFF.

Disconnect ABS module C135 (if not previously disconnected).

Disconnect wheel speed sensor C150 or C160 (if not previously disconnected).

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C150-1 C150-2

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C160-1 C160-2

Is the resistance greater 10,000 ohms?

Yes

If DTC C0031:11 or C0034:11 is present, GO to L8
If DTC C0031:15 or C0034:15 is present, GO to L9

No	REPAIR the circuit.

L8 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-8 Ground

C135-9 Ground

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-4 Ground

C135-5 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to L9

No	REPAIR the circuit.

L9 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

Ignition OFF.

Connect ABS module C135.

Ignition ON.

For the LH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C150-1 C150-2

For the RH front wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C160-1 C160-2

Is the voltage greater 10 volts?

Yes

INSTALL a new wheel speed sensor.
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

GO to L10

L10 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135 (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect wheel speed sensor C150 or C160. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Wheel Speed Sensor Electrical Fault DTCs - Rear

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. One wire is for sensor voltage supply from the ABS and the other wire is for the signal return to the ABS . With the ignition ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C0037:11	Left Rear Wheel Speed Sensor: Circuit Short to Ground	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground.
C003A:11	Right Rear Wheel Speed Sensor: Circuit Short to Ground
C0037:15	Left Rear Wheel Speed Sensor: Circuit Short to Battery or Open	These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These Diagnostic Trouble Codes (DTCs) also set if the sensor has an internal short to battery voltage or an open circuit.
C003A:15	Right Rear Wheel Speed Sensor: Circuit Short to Battery or Open

Possible Sources

Wiring, terminals or connectors
Wheel speed sensors
ABS module

Visual Inspection and Diagnostic Pre-checks

Make sure the wheel speed sensor harness is routed correctly and is undamaged.
Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.

PINPOINT TEST M: WHEEL SPEED SENSOR ELECTRICAL FAULT DTCS - REAR

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

M1 CHECK FOR FAULT REPEATABILITY

Ignition ON.

Using a diagnostic scan tool, clear all ABS module Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Test drive the vehicle above 20 km/h (12 mph).

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0037:11, C0037:15, C003A:11 or C003A:15 present?

Yes

If the Rotunda Active Wheel Speed Sensor Tester is available, GO to M2
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0037:15 or C003A:15 is present, GO to M5
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0037:11 or C003A:11 is present, GO to M7

No	The system is operating correctly at this time. INSPECT both rear wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.

M2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Ignition OFF.

Disconnect the suspect wheel speed sensor electrical connector.

Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.

Ignition ON.

Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.

Is the tester output LED illuminated?

Yes

GO to M3

GO to M5

M3 CHECK THE WHEEL SPEED SENSOR FOR A SHORT TO VOLTAGE WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Observe the current overload LED on the Rotunda Active Wheel Speed Sensor Tester.

Is the current overload LED illuminated?

Yes

REPAIR the suspect wheel speed sensor circuit for a short to voltage.

GO to M4

M4 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

Raise the suspect wheel until it can spin freely.
REFER to: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

While monitoring the Rotunda Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.

Do the sensor output Light-emitting Diodes (LEDs) illuminate and flash?

Yes

INSTALL a new wheel speed sensor.
REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
REFER to: Rear Wheel Speed Sensor - 1.6L EcoBoost (132kW/180PS) – Sigma (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

M5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

Ignition OFF.

Disconnect ABS module C135.

Disconnect wheel speed sensor C426 or C440.

Ignition ON.

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-6 Ground

C135-7 Ground

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-10 Ground

C135-11 Ground

Is any voltage present?

Yes

REPAIR the circuit.

GO to M6

M6 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN

Ignition OFF.

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-6 C440-2

C135-7 C440-1

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-10 C426-2

C135-11 C426-1

Are the resistances less than 3 ohms?

Yes

GO to M7

No	REPAIR the circuit.

M7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS

Ignition OFF.

Disconnect ABS module C135 (if not previously disconnected).

Disconnect wheel speed sensor C426 or C440 (if not previously disconnected).

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C440-1 C440-2

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C426-1 C426-2

Is the resistance greater 10,000 ohms?

Yes

If DTC C0037:11 or C003A:11 is present, GO to M8
If DTC C0037:15 or C003A:15 is present, GO to M9

No	REPAIR the circuit.

M8 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-6 Ground

C135-7 Ground

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-10 Ground

C135-11 Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to M9

No	REPAIR the circuit.

M9 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

Ignition OFF.

Connect ABS module C135.

Ignition ON.

For the LH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C440-1 C440-2

For the RH rear wheel speed sensor, measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C426-1 C426-2

Is the voltage greater 10 volts?

Yes

GO to M10

M10 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135 (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect wheel speed sensor C426 or C440.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

U3002:62

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

When the ignition is in RUN, the ABS module and the PCM share VIN information over the HS-CAN .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U3002:62	Vehicle Identification Number: Signal Compare Failure	This DTC indicates the VIN message sent by the PCM over the HS-CAN does not match the VIN stored in the ABS module.

Possible Sources

Module configuration (ABS and PCM )
ABS module

PINPOINT TEST N: U3002:62

N1 VERIFY THE PCM (POWERTRAIN CONTROL MODULE) VIN (VEHICLE IDENTIFICATION NUMBER)

Ignition ON.

Using a diagnostic scan tool, compare the VIN in the PCM to the VIN plate on the vehicle.

Does the VIN in the PCM match the VIN plate?

Yes

GO to N2

No	RECONFIGURE the PCM . FOLLOW the instructions on the diagnostic scan tool.

N2 VERIFY THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE PART NUMBER

Using a diagnostic scan tool, retrieve and record the ABS module part number.

Compare the part number retrieved to the part number in the parts catalog or equivalent.

Is the correct ABS module installed in the vehicle?

Yes

CONFIGURE the ABS module.
REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).

No	INSTALL a new ABS module and HCU assembly. REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).

C006B:00

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses information from the wheel speed sensors, RCM and PSCM to determine when Electronic Stability Control (ESC) intervention is necessary to aid in stabilizing the vehicle. The ABS module uses the HCU to modulate the brake fluid pressure to the brake calipers and continues to monitor the sensor and module input until the instability event has been corrected. Once the sensors and modules indicate the instability event has been corrected, the ABS module deactivates the HCU . Underinflated tires, wheels and tires that do not match VC label specifications, suspension and steering damage, and one or more sensor failures all contribute to the ABS module setting this DTC .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C006B:00	Stability System Active Too Long: No Sub Type Information	This DTC indicates that the Electronic Stability Control (ESC) function has been active for longer than the various sensors indicate is necessary.

Possible Sources

Tire pressure
Wheel and tire size
Chassis damage
Steering damage or alignment
Wheel speed sensor
Wheel speed sensor encoders
PSCM
RCM sensors
ABS module

PINPOINT TEST O: C006B:00

O1 VERIFY ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C006B:00 the only DTC present in the ABS module?

Yes

GO to O2

No	DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC C006B:00. GO to the ABS Module DTC Chart

O2 VERIFY THE TIRE PRESSURE

Verify all tire inflation pressures are correct as indicated on the VC label.

Are the tires inflated to the correct pressure as indicated on the VC label?

Yes

GO to O3

No	ADJUST the tire pressure as necessary.

O3 VERIFY WHEEL AND TIRE SIZE

Verify all the tires and wheels are the same size and the size matches what is indicated on the VC label.

Are all 4 wheels and tires the correct size as indicated on the VC label?

Yes

GO to O4

No	INSTALL new wheels or tires as necessary. REFER to: Wheel and Tire (204-04A Wheels and Tires, Removal and Installation).

O4 VERIFY SUSPENSION AND STEERING ALIGNMENT

Verify the suspension and steering alignment is correct.
REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).

Are the suspension and steering alignment correct?

Yes

GO to O5

No	CORRECT the suspension or steering alignment. REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).

O5 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE YAW RATE (YAW_RATE) PID (PARAMETER IDENTIFICATION)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false readings for this test.

Using a diagnostic scan tool, monitor the YAW_RATE PID .

Is the YAW_RATE PID value between -0.05 and 0.05?

Yes

GO to O6

GO to O9

O6 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LATERAL ACCELEROMETER (LAT_ACCL) PID (PARAMETER IDENTIFICATION)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false readings for this test.

Using a diagnostic scan tool, monitor the LAT_ACCL PID .

Is the LAT_ACCL PID value between -0.4 and 0.4?

Yes

GO to O7

GO to O9

O7 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LONGITUDINAL ACCELEROMETER SENSOR INPUT (LONG_ACCL) PID (PARAMETER IDENTIFICATION)

Using a diagnostic scan tool, monitor the LONG_ACCL PID .

Is the LONG_ACCL PID value between -0.4 and 0.4?

Yes

GO to O8

GO to O9

O8 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE STEERING WHEEL ANGLE SENSOR (STEER_ANGL) PID (PARAMETER IDENTIFICATION)

Using a diagnostic scan tool, monitor the STEER_ANGL PID while slowing rotating the steering wheel one complete revolution to the left and then one complete revolution to the right.

Does the PID change in intervals of 1 degree and show a 360 degree increase for each complete revolution of the steering wheel?

Yes

GO to O9

No	GO to Pinpoint Test K

O9 CHECK THE RCM (RESTRAINTS CONTROL MODULE) INSTALLATION AND MOUNTING SURFACE

Ignition OFF and wait one minute.

Disconnect RCM C310A and C310B.

Inspect the RCM installation and verify all fasteners are tightened to specifications.
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).

Inspect the RCM mounting surface for damage, corrosion, dirt and other irregularities.

Is the RCM installed correctly and the mounting surface clean and free from damage?

Yes

INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).

No	CLEAR or REPAIR the RCM mounting surface as necessary. TIGHTEN the fasteners to the correct toque specification. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

O10 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135.

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect RCM C310A and C310B. Make sure the connectors seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. Ignition OFF. WAIT 1 minute. Connect RCM C310A and C310B. CLEAR the RCM Diagnostic Trouble Codes (DTCs).

The Traction Control System Cannot Be Disabled — Vehicles Equipped With A 1.6L GTDI Engine

Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The stability / traction control OFF indicator (sliding car OFF icon) in the IPC provides traction control system status to the driver. When the driver deactivates the traction control using the stability / traction control switch, the ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C1109:64	Vehicle Dynamics Control Switch: Signal Plausibility Failure	This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground on the stability / traction control switch input circuit for longer than 150 ms.

Possible Sources

MyKey® restricted key in use
Wiring, terminals or connectors
Stability / traction control switch
ABS module

NOTE: For vehicles equipped with Intelligent Access (IA), this test requires the use of at least 2 Intelligent Access (IA) keys programmed to the vehicle, one admin Intelligent Access (IA) key and one restricted Intelligent Access (IA) key.

NOTE: For vehicles not equipped with Intelligent Access (IA), this test requires the use of at least 2 Integrated Keyhead Transmitters (IKTs) programmed to the vehicle, one admin Integrated Keyhead Transmitter (IKT) and one restricted Integrated Keyhead Transmitter (IKT).

PINPOINT TEST P: THE TRACTION CONTROL SYSTEM CANNOT BE DISABLED — VEHICLES EQUIPPED WITH A 1.6L GTDI ENGINE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

P1 VERIFY THAT THE KEY IN USE IS NOT RESTRICTED

For vehicles equipped with Intelligent Access (IA),
- place 1 Intelligent Access (IA) key inside the vehicle and all other Intelligent Access (IA) keys at least 1 meter (3 feet) away from the vehicle.
- press the start/stop button without pressing the brake pedal.

For vehicles without Intelligent Access (IA), turn the ignition to the ON position.

Monitor the message center.

Does the message center display MYKEY ACTIVE DRIVE SAFELY?

Yes

The current Intelligent Access (IA) key or Integrated Keyhead Transmitter (IKT) is a restricted key and is functioning correctly.
REPEAT the test using different Intelligent Access (IA) keys or Integrated Keyhead Transmitters (IKTs) until the message center does not display MYKEY ACTIVE DRIVE SAFELY.
GO to P2

GO to P2

P2 VERIFY THE MYKEY® TRACTION CONTROL SETTING

Using the message center, verify the MyKey® traction control setting configuration. Refer to the Owner's Literature for information on configuring the MyKey® functions.

Is the MyKey® traction control setting configured to always on?

Yes

GO to P3

GO to P4

P3 VERIFY TRACTION CONTROL FUNCTION CAN BE DISABLED USING THE ADMIN INTELLIGENT ACCESS (IA) KEY OR INTEGRATED KEYHEAD TRANSMITTER (IKT)

With the admin Intelligent Access (IA) key or Integrated Keyhead Transmitter (IKT) in the vehicle or ignition, press the stability / traction control switch for 5 seconds.

Does the sliding car OFF icon illuminate and does the message center display ELECTRONIC STABILITY CONTROL OFF?

Yes

The system is operating correctly at this time. The concern may have been caused by the use of a restricted Intelligent Access (IA) key or Integrated Keyhead Transmitter (IKT) with the MyKey® traction control setting configured to always on.
INFORM the customer that traction control can only be disabled using an admin Intelligent Access (IA) key or Integrated Keyhead Transmitter (IKT) when the MyKey® traction control setting is configured to always on.

GO to P4

P4 CHECK THE STABILITY / TRACTION CONTROL SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect ABS module C135.

Disconnect driver heated seat switch C2400.

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-34 Ground

Is the resistance greater than 10,000 ohms?

Yes

GO to P5

No	REPAIR the circuit.

P5 CHECK THE STABILITY / TRACTION CONTROL SWITCH INPUT CIRCUIT FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C135-34 C2400-6

Is the resistance less than 3 ohms?

Yes

GO to P6

No	REPAIR the circuit.

P6 CHECK THE STABILITY / TRACTION CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN

Measure:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2400-4 Ground

Is the resistance less than 3 ohms?

Yes

GO to P7

No	REPAIR the circuit.

P7 BYPASS THE STABILITY / TRACTION CONTROL SWITCH

Connect ABS module C135.

Ignition ON.

Connect a fused jumper wire in the following manner:
Click to display connectors

Positive Lead Measurement / Action Negative Lead

C2400-6 Ground

Observe the sliding car OFF icon and the message center after connecting the jumper wire to ground for 5 seconds.

Does the sliding car OFF icon illuminate and does the message center display ESC OFF?

Yes

INSTALL a new stability / traction control switch.

GO to P8

P8 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Ignition OFF.

Disconnect and inspect ABS module C135.

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect ABS module C135. Make sure the connector seats and latches correctly.

Connect driver heated seat switch C2400. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

P0557, P0558

Refer to Wiring Diagrams Cell 24 for schematic and connector information.

Normal Operation and Fault Conditions

The brake booster pressure sensor receives a sensor supply voltage of 5 volts from the PCM . The sensor is also grounded through the PCM . The sensor uses the pressure differential between the atmosphere and the brake booster vacuum chamber to produce a return voltage signal to the PCM between 0.2 volt and 4.9 volts. The PCM uses other sensor inputs to determine the validity of the sensor signal and the working condition of the sensor itself.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
P0557	Brake Booster Pressure Sensor Circuit Low	This DTC sets when the signal returned by the sensor is below a predetermined limit. This is usually caused by a short to voltage, an open or an internal failure of the sensor.
P0558	Brake Booster Pressure Sensor Circuit High	This DTC sets when the signal returned by the sensor is above a predetermined limit. This is usually caused by a short to voltage, an open or an internal failure of the sensor.

Possible Sources

Wiring, terminals or connectors
Brake booster pressure sensor (part of the vacuum tube harness)

PINPOINT TEST Q: P0557, P0558

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Q1 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, clear the PCM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the PCM KOEO self-test.

Does DTC P0557 or P0558 return?

Yes

GO to Q2

No	The concern causing the DTC to set is not present at this time. DISCONNECT brake booster pressure sensor C1603 and PCM C175B. INSPECT both connectors to corrosion, pushed-out pins, bent pins or spread terminals. REPAIR as necessary.

Q2 CHECK THE BRAKE BOOSTER PRESSURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect PCM C175B.

Disconnect brake vacuum sensor C1603.

Ignition ON.

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1603-1		Ground
C1603-2		Ground
C1603-3		Ground

Is any voltage present?

Yes

REPAIR the circuit.

GO to Q3

Q3 CHECK THE BRAKE BOOSTER PRESSURE SENSOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1603-1		Ground
C1603-2		Ground
C1603-3		Ground

Are the resistances greater than 10,000 ohms?

Yes

GO to Q4

No	REPAIR the circuit.

Q4 CHECK THE BRAKE BOOSTER PRESSURE SENSOR CIRCUITS FOR AN OPEN

Measure:

1.6L TIVCT South America

Positive Lead	Measurement / Action	Negative Lead
C1603-1		C175B-26
C1603-2		C175B-43
C1603-3		C175B-14

All Other

Positive Lead	Measurement / Action	Negative Lead
C1603-1		C175B-32
C1603-2		C175B-43
C1603-3		C175B-22

Are the resistances less than 3 ohms?

Yes

GO to Q5

No	REPAIR the circuit.

Q5 CHECK THE BRAKE BOOSTER PRESSURE SENSOR CIRCUITS FOR A SHORT TOGETHER

Measure:
Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1603-1		C1603-2
C1603-1		C1603-3
C1603-2		C1603-3

Are the resistances greater than 10,000 ohms?

Yes

GO to Q6

No	REPAIR the circuit.

Q6 VERIFY ALL WIRING CONNECTIONS

Ignition OFF.

Disconnect all in-line electrical connectors between the brake booster pressure sensor and the PCM .

Using a good light source, inspect all disconnected electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- spread terminals - install new terminals as necessary

Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?

Yes

INSTALL a new brake booster pressure sensor.

No	REPAIR the connector or terminals. Refer to Wiring Diagrams Cell 5 for schematic and connector information.

Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description. Description and Operation

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