Ford Fiesta Manuals

Ford Fiesta: Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start / Passive Anti-Theft System (PATS). Diagnosis and Testing

Ford Fiesta 2014 - 2019 Service Manual / Electronic Feature Group / Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start / Passive Anti-Theft System (PATS). Diagnosis and Testing

RFA Module DTC Chart

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).

  DTC Description Action
B102B:05 Passive Key: System Programming Failure Less than 2 keys are programmed into the RFA module. If other PATS Diagnostic Trouble Codes (DTCs) are present, address them first. If DTC B102B:05 is the only DTC present, PROGRAM a minimum of 2 keys.
REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).
B10C7:1F Interior Trunk Antenna: Circuit Intermittent   GO to Pinpoint Test A
B10C8:1F Interior Centre Antenna: Circuit Intermittent   GO to Pinpoint Test A
B10C9:1F Interior Front Antenna: Circuit Intermittent   GO to Pinpoint Test A
B10D5:13 PATS Antenna: Circuit Open The RFA module received an incomplete or corrupt response from the PATS transceiver. INSTALL a new transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation).
B10D6:62 PATS Enable Status: Signal Compare Failure   GO to Pinpoint Test F
B10D7:05 PATS Key: System Programming Failure   GO to Pinpoint Test D
B10D8:00 PATS Key Less Than Minimum Programmed: No Sub Type Information Less than 2 keys are programmed into the RFA module. If other PATS Diagnostic Trouble Codes (DTCs) are present, address them first. If DTC B10D8:00 is the only DTC present, PROGRAM a minimum of 2 keys.
REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).
B10D9:87 PATS Transponder: Missing Message   GO to Pinpoint Test E
B10DA:51 PATS Target Identifier: Not Programmed There is no PCM ID stored in the RFA module. PERFORM the parameter reset.
REFER to: Passive Anti-Theft System (PATS) Parameter Reset (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).
B10DA:62 PATS Target Identifier: Signal Compare Failure There is an incorrect PCM ID stored in the RFA module. PERFORM the parameter reset.
REFER to: Passive Anti-Theft System (PATS) Parameter Reset (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).
B10E6:11 PATS Power Supply: Circuit Short To Ground   GO to Pinpoint Test E
B10E6:12 PATS Power Supply: Circuit Short To Battery   GO to Pinpoint Test E
U0100:87 Lost Communication With ECM/PCM "A": Missing Message   GO to Pinpoint Test F
All other Diagnostic Trouble Codes (DTCs) -  
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

PCM DTC Chart

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).

  DTC Description Action
U0167:00 Lost Communication With Vehicle Immobilizer Control Module: No Sub Type Information   GO to Pinpoint Test G
U0426:00 Invalid Data Received From Vehicle Immobilizer Control Module: No Sub Type Information   GO to Pinpoint Test G
All other Diagnostic Trouble Codes (DTCs) -   Refer to the appropriate section in Group 303 for the procedure.

Symptom Chart

Symptom Chart: PATS

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).

Condition Possible Causes Actions
The vehicle does not start with the passive key in certain areas within the vehicle but starts using the passive key backup location
  • Refer to the Pinpoint Test
  • GO to Pinpoint Test A
Unable to turn the ignition on or the vehicle does not start
  • Refer to the Pinpoint Test
  • GO to Pinpoint Test B
Key Not Detected displays in the message center
  • Refer to the Pinpoint Test
  • GO to Pinpoint Test C
Unable to program keys
  • Refer to the Pinpoint Test
  • Using a diagnostic scan tool, PERFORM the RFA module self-test. REFER to the RFA Module DTC Chart in this section.

Pinpoint Tests

The Vehicle Does Not Start With The Passive Key In Certain Areas Within The Vehicle But Starts Using The Passive Key Backup Location


Refer to Wiring Diagrams Cell 112 for schematic and connector information.

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).


  RFA Module DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10C7:1F Interior Trunk Antenna: Circuit Intermittent Sets when the RFA module detects an open or short from one of the circuits to the PATS rear antenna.
B10C8:1F Interior Centre Antenna: Circuit Intermittent Sets when the RFA module detects an open or short from one of the circuits to the PATS center antenna.
B10C9:1F Interior Front Antenna: Circuit Intermittent Sets when the RFA module detects an open or short from one of the circuits to the PATS front antenna.

Possible Causes

  • Wiring, terminals or connectors
  • Environmental interference
  • PATS front antenna
  • PATS center antenna
  • PATS rear antenna
  • RFA module

PINPOINT TEST A: THE VEHICLE DOES NOT START WITH THE PASSIVE KEY IN CERTAIN AREAS WITHIN THE VEHICLE BUT STARTS USING THE PASSIVE KEY BACKUP LOCATION
A1 CHECK THE PASSIVE KEY LOCATION
  • Check the location of the passive key. If it is placed in the far corners of the interior of the vehicle, move the passive key out of these areas and attempt to start the vehicle.

Does the vehicle start?
Yes The system is OK. INFORM the customer of the normal vehicle operation.
No GO to A2

A2 CHECK FOR ENVIRONMENTAL INTERFERENCE
  • Check for the use of a charger or other wireless device that can cause interference with the passive key. If any device is found, remove the device and attempt to start the vehicle.

Does the vehicle start?
Yes The system is OK. INFORM the customer of the normal vehicle operation.
No GO to A3

A3 CHECK THE SUSPECT ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE
  • Disconnect RFA Module C3503E .
  • Disconnect Suspect PATS antenna.
  • Use the back-up method to transition the ignition on by placing the passive key next to the PATS transceiver and pressing the START/STOP button.
  • Measure:
    Click to display connectors

      PATS Front Antenna


    Positive Lead Measurement / Action Negative Lead
      C2065-1   Ground
      C2065-2   Ground

    Click to display connectors

      PATS Center Antenna


    Positive Lead Measurement / Action Negative Lead
      C325-1   Ground
      C325-2   Ground

    Click to display connectors

      PATS Rear Antenna


    Positive Lead Measurement / Action Negative Lead
      C4378-1   Ground
      C4378-2   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to A4

A4 CHECK THE SUSPECT ANTENNA CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors

      PATS Front Antenna


    Positive Lead Measurement / Action Negative Lead
      C2065-1   Ground
      C2065-2   Ground

    Click to display connectors

      PATS Center Antenna


    Positive Lead Measurement / Action Negative Lead
      C325-1   Ground
      C325-2   Ground

    Click to display connectors

      PATS Rear Antenna


    Positive Lead Measurement / Action Negative Lead
      C4378-1   Ground
      C4378-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to A5
No REPAIR the circuit in question.

A5 CHECK THE SUSPECT ANTENNA CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors

      PATS Front Antenna


    Positive Lead Measurement / Action Negative Lead
      C2065-1   C3503E-9
      C2065-2   C3503E-2

    Click to display connectors

      PATS Center Antenna


    Positive Lead Measurement / Action Negative Lead
      C325-1   C3503E-17
      C325-2   C3503E-5

    Click to display connectors

      PATS Rear Antenna


    Positive Lead Measurement / Action Negative Lead
      C4378-1   C3503E-11
      C4378-2   C3503E-4

Are the resistances less than 3 ohms?
Yes INSTALL a new antenna in question. For the PATS front antenna,
REFER to: Passive Anti-Theft System (PATS) Front Antenna (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation). For the PATS center antenna,
REFER to: Passive Anti-Theft System (PATS) Center Antenna (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation). For the PATS rear antenna,
REFER to: Passive Anti-Theft System (PATS) Rear Antenna (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to A6
No REPAIR the circuit in question.

A6 CHECK FOR CORRECT RFA (REMOTE FUNCTION ACTUATOR) MODULE OPERATION
  • Disconnect and inspect all of the RFA module connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the RFA module connectors and make sure they seat and latch 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RFA module.
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.


Unable To Turn The Ignition On Or The Vehicle Does Not Start

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

Possible Causes

  • Driveability system concern
  • Starting system concern
  • PATS concern

PINPOINT TEST B: UNABLE TO TURN THE IGNITION ON OR THE VEHICLE DOES NOT START
B1 CHECK FOR THE KEY NOT DETECTED MESSAGE
  • NOTE: Prior to performing any diagnostics press the unlock button on a passive key to make sure the passive key disable feature is not the cause of the concern. Check the message center while pressing the START/STOP button.

Is the Key Not Detected message displayed in the message center?
Yes GO to Pinpoint Test C
No GO to B2

B2 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) OPERATION
  • Observe the IPC operation while pressing the START/STOP button.

Do any of the indicators in the IPC prove-out, indicating the ignition is on?
Yes GO to B3
No GO to B4

B3 CHECK FOR RFA (REMOTE FUNCTION ACTUATOR) MODULE AND PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the RFA module self-test.
  • Using a diagnostic scan tool, perform the PCM self-test.

Are any RFA module or PCM Diagnostic Trouble Codes (DTCs) present?
Yes REFER to the RFA module DTC Chart or the PCM DTC Chart in this section.
No The condition is not PATS -related. DIAGNOSE the base drivetrain. Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

B4 CHECK FOR DIAGNOSTIC SCAN TOOL COMMUNICATION WITH THE VEHICLE
  • Follow the procedure to establish a diagnostic scan tool session with the vehicle.
    REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Does the diagnostic scan tool establish communication with the vehicle?
Yes The no-start condition is not PATS -related. DIAGNOSE the accessories not having power when the ignition is on.
REFER to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


Key Not Detected Displays In The Message Center

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

Possible Causes

  • Passive key
  • Environmental interference

Visual Inspection and Diagnostic Pre-Checks

  • Inspect the passive key for damage.

PINPOINT TEST C: KEY NOT DETECTED DISPLAYS IN THE MESSAGE CENTER
C1 CHECK THE RKE (REMOTE KEYLESS ENTRY) TRANSMITTER OPERATION
  • Press the lock and unlock RKE transmitter buttons on the suspect passive key.

Do the doors lock and unlock?
Yes GO to C2
No
REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).

C2 CHECK THE PASSIVE KEY OPERATION FROM MULTIPLE AREAS
  • Place the passive key in several locations within the vehicle and press the START/STOP button each time.

Does the ignition turn on with the passive key in certain areas only?
Yes GO to Pinpoint Test A
No GO to C3

C3 CHECK FOR ENVIRONMENTAL INTERFERENCE

NOTE: Some brands/types of mobile phone or laptop computer chargers may cause interference that could lead to a PATS no-start if the passive key is within a few inches of the charger. If a concern is observed, move the passive key away from the charger and attempt to start the vehicle.

  • Check for the use of a charger or other wireless device that can cause interference with the passive key. If any device is found, remove the device and press the START/STOP button.

Does the ignition turn on?
Yes INFORM the customer of the cause of the concern and the normal operation of the vehicle.
No GO to C4

C4 CHECK THE PASSIVE KEY
  • Place the passive key in the backup location (next to the PATS transceiver) and press the START/STOP button.

Does the ignition turn on?
Yes GO to Pinpoint Test A
No GO to C5

C5 CHECK THE PASSIVE KEY PROGRAMMING
  • Program the passive key.
    REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).

Does the passive key successfully program?
Yes The concern was caused by an unprogrammed passive key.
No REPLACE the passive key. PROGRAM a new passive key.
REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures). TEST the system for normal operation. If the concern is still present, GO to C6

C6 CHECK FOR CORRECT RFA (REMOTE FUNCTION ACTUATOR) MODULE OPERATION
  • Disconnect and inspect all of the RFA module connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the RFA module connectors and make sure they seat and latch 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RFA module.
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.


B10D7:05

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

When the RFA module enters a key programming state, it activates the PATS transceiver to read the key placed next to it. The key is programmed into the RFA module memory if a valid passive key is used and there are no concerns with the PATS .


  RFA Module DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D7:05 PATS Key: System Programming Failure Sets when a passive key unsuccessfully programmed into the RFA module.

Possible Causes

  • Passive key
  • PATS transceiver

Visual Inspection and Diagnostic Pre-Checks

  • Inspect the passive key for damage.

PINPOINT TEST D: B10D7:05
NOTE: At least 2 passive keys must be present prior to carrying out this pinpoint test.
D1 CHECK FOR OTHER RFA (REMOTE FUNCTION ACTUATOR) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Check the results from the RFA module self-test.

Are any other RFA module Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. REFER to the RFA Module DTC Chart in this section.
No GO to D2

D2 CHECK THE PASSIVE KEYS
  • Verify the correct passive keys are used with the vehicle.

Are the correct passive keys being used?
Yes GO to D3
No REPLACE the passive key(s) in question. PROGRAM the new passive key(s).
REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).

D3 PROGRAM THE PASSIVE KEY(S)
  • Attempt to program the passive key(s) in question.
    REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).

Do(es) the key(s) program successfully?
Yes The concern was caused by an incomplete passive key programming procedure.
No GO to D4

D4 CHECK BOTH PASSIVE KEYS
  • Attempt to program both passive keys.
    REFER to: Erase All Keys and Key Programming (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).
  • Press the START/STOP button with each passive key in the vehicle, one at a time.

Does the ignition turn on with both passive keys?
Yes The concern was caused by an unprogrammed key.
No If only one passive key operates, REPLACE the passive key that did not program. PROGRAM the new key.
REFER to: Key Programming Using Diagnostic Equipment (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures). If no passive key operates, INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation). PROGRAM the keys.
REFER to: Erase All Keys and Key Programming (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, General Procedures).


B10D9:87, B10E6:11, or B10E6:12


Refer to Wiring Diagrams Cell 112 for schematic and connector information.

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

The RFA module supplies voltage to the PATS transceiver. If the RFA module does not detect a passive key from the PATS antennas, it activates the PATS transceiver as a backup to try and detect a programmed passive key. The RFA module also activates the PATS transceiver for key programming procedures. The RFA module starts the key interrogation sequence by supplying voltage to the transceiver. Once the PATS transceiver is powered up, the RFA module generates a signal to the transceiver on the transmit circuit. When the transceiver receives the signal from the RFA module, it reads the PATS key and generates a challenge response to the RFA module signal and sends this response on the receive circuit.


  RFA Module DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D9:87 PATS Transponder: Missing Message Sets when the RFA module does not receive a response from the PATS transceiver.
B10E6:11 PATS Power Supply: Circuit Short To Ground Sets when the RFA module detects a short to ground from the PATS transceiver voltage supply circuit.
B10E6:12 PATS Power Supply: Circuit Short To Battery Sets when the RFA module detects a short to voltage from the PATS transceiver voltage supply circuit.

Possible Causes

  • Environmental interference
  • Passive key

Visual Inspection and Diagnostic Pre-Checks

  • Inspect the passive key for damage.

PINPOINT TEST E: B10D9:87, B10E6:11, OR B10E6:12
E1 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) B10E6:11, OR B10E6:12
  • Review the results from the RFA module self-test.

Is DTC B10E6:11 or B10E6:12 present?
Yes For DTC B10E6:11, GO to E2
For DTC B10E6:12, GO to E4
No GO to E5

E2 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect PATS Transceiver C252 .
  • Ignition ON.
  • Using a diagnostic scan tool, clear the RFA module Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the RFA module self-test.

Is DTC B10E6:11 still present?
Yes GO to E3
No INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation).

E3 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect RFA Module C3503A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to E11
No REPAIR the circuit.

E4 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PATS Transceiver C252 .
  • Disconnect RFA Module C3503A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-1   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to E11

E5 CHECK FOR VOLTAGE TO THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER

NOTE: The RFA module only supplies voltage to the PATS transceiver momentarily. It is important to monitor the meter when pressing the START/STOP button.

NOTE: Remove all passive keys from inside the vehicle. If the RFA module detects a key, it does not activate the PATS transceiver.

  • Ignition OFF.
  • Disconnect PATS Transceiver C252 .
  • While pressing the START/STOP button, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-1   Ground

Is the voltage momentarily greater than 11 volts when the START/STOP button is pressed?
Yes GO to E7
No GO to E6

E6 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect RFA Module C3503A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-1   C3503A-10

Is the resistance less than 3 ohms?
Yes GO to E11
No REPAIR the circuit.

E7 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-2   Ground

Is the resistance less than 3 ohms?
Yes GO to E8
No REPAIR the circuit.

E8 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER TRANSMIT AND RECEIVE CIRCUITS FOR A SHORT TO VOLTAGE
  • Disconnect RFA Module C3503A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-3   Ground
      C252-4   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to E9

E9 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER TRANSMIT AND RECEIVE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-3   Ground
      C252-4   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to E10
No REPAIR the circuit in question.

E10 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER TRANSMIT AND RECEIVE CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C252-3   C3503A-11
      C252-4   C3503A-12

Are the resistances less than 3 ohms?
Yes INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to E11
No REPAIR the circuit in question.

E11 CHECK FOR CORRECT RFA (REMOTE FUNCTION ACTUATOR) MODULE OPERATION
  • Disconnect and inspect all of the RFA module connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the RFA module connectors and make sure they seat and latch 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RFA module.
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.


B10D6:62 or U0100:87

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

When the ignition transitions out of off, the RFA module checks the PCM ID and compares it with the PCM ID that is stored in the RFA module memory. If the RFA module does not receive the PCM ID or the ID is invalid, the PATS is enables and does not allow the engine to start.


  RFA Module DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D6:62 PATS Enable Status: Signal Compare Failure Sets when the RFA module does not receive the expected target ID from the PCM over the HS-CAN . The target ID is only sent one time per ignition cycle and is sent within milliseconds of the ignition transitioning out of off.
U0100:87 Lost Communication With ECM/PCM "A": Missing Message Sets when the RFA module does not receive the expected target ID from the PCM over the HS-CAN . The target ID is only sent one time per ignition cycle and is sent within milliseconds of the ignition transitioning out of off.

Possible Causes

  • Network concern
  • Low battery state of charge
  • PCM

PINPOINT TEST F: B10D6:62 OR U0100:87
F1 CHECK THE BATTERY STATE OF CHARGE
  • NOTE: It may be necessary to check battery voltage while cranking the engine to make sure battery voltage is not dropping too low and causing the concern. Perform the Battery Condition Test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the Battery Condition Test?
Yes GO to F2
No RECHARGE or REPLACE the battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

F2 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:00
  • Review the results from the RFA module self-test.

Is DTC U0100:00 present?
Yes
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No

F3 RECHECK THE RFA (REMOTE FUNCTION ACTUATOR) MODULE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
  • Ignition ON.
  • Using a diagnostic scan tool, clear the RFA module Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the RFA module self-test.

Is DTC B10D6:62 or U0100:87 still present?
Yes
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

F4 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Disconnect and inspect all of the PCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the PCM connectors and make sure they seat and latch 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern,
   Click here to access Guided Routine (PCM).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.


U0167:00 or U0426:00

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Entry and Push Button Start, Description and Operation).

When the ignition transitions out of off, the RFA module checks the PCM ID and compares it with the PCM ID that is stored in the RFA module memory. If the RFA module does not receive the PCM ID or the ID is invalid, the PATS is enables and does not allow the engine to start.


  RFA Module DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
U0167:00 PATS Enable Status: Signal Compare Failure Sets when the RFA module does not receive the expected target ID from the PCM over the HS-CAN . The target ID is only sent one time per ignition cycle and is sent within milliseconds of the ignition transitioning out of off.
U0426:00 Lost Communication With ECM/PCM "A": Missing Message Sets when the RFA module does not receive the expected target ID from the PCM over the HS-CAN . The target ID is only sent one time per ignition cycle and is sent within milliseconds of the ignition transitioning out of off.

Possible Causes

  • Network concern
  • Low battery state of charge
  • RFA module

PINPOINT TEST G: U0167:00 OR U0426:00
G1 CHECK THE BATTERY STATE OF CHARGE
  • NOTE: It may be necessary to check battery voltage while cranking the engine to make sure battery voltage is not dropping too low and causing the concern. Perform the Battery Condition Test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the Battery Condition Test?
Yes GO to G2
No RECHARGE or REPLACE the battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

G2 CHECK FOR COMMUNICATION WITH THE RFA (REMOTE FUNCTION ACTUATOR) MODULE
  • Ignition ON.
  • Using a diagnostic scan tool, perform the network test.

Does the RFA module respond to the diagnostic scan tool?
Yes GO to G3
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

G3 CHECK FOR RFA (REMOTE FUNCTION ACTUATOR) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the RFA module self-test.

Are any RFA module Diagnostic Trouble Codes (DTCs) present?
Yes REFER to the RFA Module DTC Chart in this section.
No GO to G4

G4 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
  • Ignition ON.
  • Using a diagnostic scan tool, clear the PCM Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the PCM self-test.

Is DTC U0167:00 or U0426:00 still present?
Yes GO to G5
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

G5 CHECK FOR CORRECT RFA (REMOTE FUNCTION ACTUATOR) MODULE OPERATION
  • Disconnect and inspect all of the RFA module connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the RFA module connectors and make sure they seat and latch 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 TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RFA module.
REFER to: Remote Function Actuator (RFA) Module (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.


    Passive Anti-Theft System (PATS) - System Operation and Component Description. Description and Operation

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    Refer to: Health and Safety Precautions (100-00 General Information, Description and Operation).
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