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Home >> Infiniti >> 2017 >> Q60 Base, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (Electric Power Steering) (DTC/Circuit Diagnosis) >> DTC / Circuit Diagnosis >> DTC C1609: Vehicle Speed Signal >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

    G-20With CONSULT 

    1. Turn the ignition switch OFF to ON.
    2. Perform "ABS" self-diagnosis. Refer to CONSULT FUNCTION .

    Is any DTC detected?

    YES 

    Check the DTC. Refer to DTC INDEX .

    NO 

    GO TO STEP 2. 

  2. CHECK CONNECTOR AND TERMINAL

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Disconnect power steering control module harness connector.
    4. Check the connector for disconnection or looseness.
    5. Check the pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Repair or replace harness, connector, or terminal, securely lock the connector.

  3. PERFORM SELF-DIAGNOSIS

    G-20With CONSULT 

    1. Connect ABS actuator and electric unit (control unit) harness connector.
    2. Connect power steering control module harness connector.
    3. Turn the ignition switch OFF to ON.
    4. Erase self-diagnostic results for "EPS/DAST 3".
    5. Turn the ignition switch OFF and wait for at least 10 seconds.
    6. Turn the ignition switch OFF to ON.
    7. Perform self-diagnosis for "EPS/DAST 3".

    Is DTC "C1609" detected?

    YES 

    Power steering control module is malfunctioning. Replace steering gear assembly. Refer to REMOVAL AND INSTALLATION .

    NO 

    Check pin terminal and connection of each harness connector for malfunctioning conditions.