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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 238 (Steering Control System (Diagnostic Trouble Codes (DTCS) C13D4-00 - U1010-49 And Circuit Diagnosis) (Hybrid)) >> DTC/Circuit Diagnosis >> DTC C13DB-00: Steering Torque Sensor >> DAST 1 >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK TORQUE SENSOR POWER SUPPLY CIRCUIT

    G-20With CONSULT 

    1. Turn the ignition switch ON.
    2. On the CONSULT screen, select "DAST 1">>"DATA MONITOR">>"TORQUE SEN VOLTAGE".
    3. Check the value
      Monitor item Standard value (Approx.)
      TORQUE SEN VOLTAGE 4.5 - 5.5 V

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Perform the trouble diagnosis for battery power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

  2. CHECK TORQUE SENSOR GROUND CIRCUIT

    1. Disconnect steering angle main control module harness connector.
    2. 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 STEP 3  .

    NO 

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

  3. CHECK TORQUE SENSOR SIGNAL

    G-20With CONSULT 

    1. Connect steering angle main control module harness connector.
    2. Set the vehicle to READY state or 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
      Monitor item Condition Standard value (Approx.)
      TORQUE SEN MAIN 2 Steering wheel: Not steering
      (There is no steering force)      		 Approx. 2.5 V
      Steering wheel: Right turn Approx. 1.4 - 2.5 V
      Steering wheel: Left turn Approx. 2.5 - 3.6 V
      TORQUE SEN SUB Steering wheel: Not steering
      (There is no steering force)      		 Approx. 2.5 V
      Steering wheel: Right turn Approx. 1.4 - 2.5 V
      Steering wheel: Left turn Approx. 2.5 - 3.6 V

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK TORQUE SENSOR CIRCUIT

    1. Disconnect steering angle main control module harness connector.
    2. Disconnect steering torque sensor harness connector.
    3. 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
    4. 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 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 HOW TO CHECK TERMINAL .
    3. Perform intermittent incident while turning steering wheel. Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    Replace steering angle main control module. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace error - detected part.

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