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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTCS) (1 Of 2) >> DAST 1 (Steering Angle Main Control Module) >> C13DB-00 Steering Torque Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK TORQUE SENSOR POWER SUPPLY CIRCUIT 

    SYMBOL With CONSULT

    1. Turn the ignition switch ON.
    2. On the CONSULT screen, select "DAST 1">>"DATA MONITOR">>"TORQUE SEN VOLTAGE".
    3. Check the value. Refer to Values On The Diagnosis Tool .

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Perform the trouble diagnosis for 12V battery power supply circuit.

  2. CHECK TORQUE SENSOR GROUND CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect steering angle main control module harness connector.
    3. Check the continuity between control module harness connector and ground.
      Steering angle main control module - Continuity
      Connector Terminal
      E26 32 Ground Existed

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair open circuit or short to ground or short to power in harness or connectors.

  3. CHECK TORQUE SENSOR SIGNAL 

    SYMBOL With CONSULT

    1. Connect steering angle main control module harness connector.
    2. Start the engine.
      CAUTION:

      Never drive the vehicle.

    3. On the CONSULT screen, select "DAST 1">>"DATA MONITOR">>"TORQUE SEN MAIN 2", and "TORQUE SEN SUB".
    4. Check the value. Refer to Values On The Diagnosis Tool .

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    GO TO 4.

  4. CHECK TORQUE SENSOR CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect steering angle main control module harness connector.
    3. Disconnect steering torque sensor harness connector.
    4. Check the continuity between steering angle main control module harness connector and steering torque sensor harness connector.
      Steering angle main control module Steering torque sensor Continuity
      Connector Terminal Connector Terminal
      E26 8 E95 2 Existed
      1 4
      3 3
      7 1
    5. Check the continuity between control module harness connector and ground.
      Steering angle main control module - Continuity
      Connector Terminal
      E26 8 Ground Not existed
      1
      3
      7

    Is the inspection result normal?

    YES>>

    Torque sensor is malfunction. Replace steering gear assembly. Refer to STEERING GEAR AND LINKAGE : Removal and Installation .

    NO>>

    Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK INTERMITTENT INCIDENT 
    1. Turn the ignition switch OFF.
    2. Check enlarged contact spring of terminal. Refer to Inspection .
    3. Perform intermittent incident while turning steering wheel. Refer to Inspection .

    Is the inspection result normal?

    YES>>

    Replace steering angle main control module. Refer to STEERING ANGLE MAIN CONTROL MODULE : Removal and Installation .

    NO>>

    Repair / replace harness, connector, or terminal.