Ford Fiesta: Front End Body Panels / Active Grille Shutter. Diagnosis and Testing

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).

  Powertrain Control Module (PCM) DTC Chart

Symptom Chart(s)

Symptom Chart: Active Grille Shutter

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

Pinpoint Test(s)

The Active Grille Shutter is Inoperative or Does Not Operate Correctly

Refer to Wiring Diagrams Cell 33 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Active Grille Shutter - System Operation and Component Description (501-02 Front End Body Panels, Description and Operation).

  DTC Fault Trigger Conditions

Possible Sources

• Fuse
• Wiring, terminals or connectors
• Active grille shutter
• PCM

Visual Inspection and Diagnostic Pre-checks

• Verify BJB fuse 27 (15A) is OK.
• Make sure the grille opening does not have any debris or other obstructions that inhibit operation of the grille shutter.
• Make sure the grille shutter actuator electrical connector is not disconnected.

A1 RETRIEVE THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON. Using a diagnostic scan tool, perform PCM self-test. Is DTC DTC P05A7, U0046 or U0284 present? Yes GO to A2 No For DTC P059F, P05A1 or P05A2, GO to A9 For all other PCM Diagnostic Trouble Codes (DTCs), Refer to the appropriate section in Group 303 for the procedure.

A2 CHECK THE VOLTAGE SUPPLY TO THE GRILLE SHUTTER ACTUATOR

Ignition OFF. Disconnect: Grille Shutter Actuator C1651. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-3   Ground Is the voltage greater than 11 volts? Yes GO to A3 No VERIFY BJB fuse 27 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A3 CHECK THE GRILLE SHUTTER ACTUATOR GROUND CIRCUIT FOR AN OPEN

Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-1   Ground Is the resistance less than 3 ohms? Yes For DTC U0046 or U0284, GO to A4 For DTC P05A7, GO to A11 No REPAIR the circuit.

A4 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

Disconnect: Grille Shutter Actuator C1651. Disconnect: PCM C1381B. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-2   C1381B-50 Is the resistance less than 3 ohms? Yes GO to A5 No REPAIR the circuit.

A5 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-2   Ground Is any voltage present? Yes GO to A6 No GO to A7

A6 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE WITH THE BATTERY MONITORING SENSOR DISCONNECTED

Ignition OFF. Disconnect: Battery Monitoring Sensor C1646. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-2   Ground Is any voltage present? Yes REPAIR the circuit. No INSTALL a new battery monitoring sensor. REFER to: Battery Monitoring Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).

A7 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-2   Ground Is the resistance greater than 10,000 ohms? Yes GO to A12 No GO to A8

A8 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND WITH THE COOLANT PUMP DISCONNECTED

Disconnect: Battery Monitoring Sensor C1646. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead   C1651-2   Ground Is the resistance greater than 10,000 ohms? Yes INSTALL a new battery monitoring sensor. REFER to: Battery Monitoring Sensor (414-01 Battery, Mounting and Cables, Removal and Installation). No REPAIR the circuit.

A9 VERIFY THE GRILLE SHUTTER OPERATION USING THE GRILLE SHUTTER A POSITION - COMMANDED (GRILL_A_CMD) PARAMETER IDENTIFICATION (PID)

Start the engine and allow it to idle for at least 30 seconds to allow for the grille shutter calibration to complete. Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs). Using a diagnostic scan tool, select the PCM Parameter Identification (PID) GRILL_A_CMD and active command the grille shutter from 100% (open) to 0% (closed) while observing the grille shutter operation from the front of the vehicle. Does the grille shutter fully open and close when commanded by the diagnostic scan tool? Yes The grille shutter system is operating correctly at this time. The concern may have been caused by debris or obstruction. No GO to A10

A10 CHECK THE GRILLE SHUTTER FOR OBSTRUCTIONS AND/OR MECHANICAL BINDING CONCERNS

Ignition OFF. Remove the grille shutter actuator. Manually open and close the grille shutter, removing any obstructions which can inhibit operation of the grille shutter or linkage. The grille shutter should open and close easily with no binding. Does the grille shutter operate freely with no binding or obstruction? Yes GO to A11 No REPAIR the binding/obstruction, or if necessary, INSTALL a new active grille shutter. REFER to: Active Grille Shutter (501-02 Front End Body Panels, Removal and Installation).

A11 CHECK FOR CORRECT GRILLE SHUTTER ACTUATOR OPERATION

Disconnect: Grille Shutter Actuator C1651 (if not previously disconnected). Inspect the grille shutter actuator electrical connector and jumper harness. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins as necessary pushed-out pins - install new pins as necessary Reconnect the grille shutter actuator connector, jumper harness and all previously disconnected system connectors. 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 active grille shutter. REFER to: Active Grille Shutter (501-02 Front End Body Panels, 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.

A12 CHECK FOR THE CORRECT GRILLE SHUTTER ACTUATOR OPERATION

Inspect the grille shutter actuator and PCM electrical connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins as necessary pushed-out pins - install new pins as necessary Reconnect the grille shutter actuator connector, jumper harness and all previously disconnected system connectors. 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 active grille shutter. REFER to: Active Grille Shutter (501-02 Front End Body Panels, Removal and Installation). CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the concern is still present,    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.