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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (DTC/Circuit Diagnosis) (1 Of 2) >> DTC/Circuit Diagnosis >> C13AC-00 Control Module >> DAST 1 >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK STEERING FORCE CONTROL MODULE POWER SUPPLY CIRCUIT (1) 
      1. Ignition switch OFF.
      2. Disconnect steering force control module connector.
      3. Check the voltage between steering force control module harness connector and ground.
        (+) (-) Voltage(Approx.)
        Steering force control module
        Connector Terminal
        E142 33 Ground Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    GO TO 2.

  2. CHECK STEERING FORCE CONTROL MODULE POWER SUPPLY CIRCUIT (2) 
      1. Check the 60A fusible link (#Q).
      2. Check the harness for open or short between steering force control module harness connector E142 terminal 33 and the 60A fusible link (#Q).

    Is the inspection result normal?

    YES>>

    Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate Wiring Diagram.

    NO>>

    Repair or replace malfunctioning components.

  3. CHECK STEERING ANGLE SUB CONTROL MODULE POWER SUPPLY CIRCUIT (1) 
      1. Ignition switch OFF.
      2. Disconnect steering angle sub control module connector.
      3. Check the voltage between steering angle sub control module harness connector and ground.
        (+) (-) Voltage(Approx.)
        Steering angle sub control module
        Connector Terminal
        E145 33 Ground Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    GO TO 4.

  4. CHECK STEERING ANGLE SUB CONTROL MODULE POWER SUPPLY CIRCUIT (2) 
      1. Check the 100A fusible link (#Z).
      2. Check the harness for open or short between steering angle sub control module harness connector E145 terminal 33 and the 100A fusible link (#Z).

    Is the inspection result normal?

    YES>>

    Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate Wiring Diagram.

    NO>>

    Repair or replace malfunctioning components.

  5. PERFORM SELF-DIAGNOSIS 
    1. SYMBOL CONSULT
      1. Ignition switch ON.
      2. Erase "Self Diagnostic Result" mode of "DAST 1".
      3. Ignition switch OFF and wait for at least 10 seconds.
      4. Start the engine.
        CAUTION:

        Never drive the vehicle.

      5. Select "Self Diagnostic Result" mode of "DAST 1".

    Is DTC "C13AC-00" detected?

    YES>>

    Replace steering angle main control module. Refer to Removal and Installation .

    NO>>