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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (DTC/Circuit Diagnosis) (2 Of 2) >> DTC/Circuit Diagnosis >> C13DE-00 Temperature Sensor >> EPS/DAST 3 >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK TEMPERATURE SENSOR POWER SUPPLY (1) 
      1. Ignition switch OFF.
      2. Disconnect force motor angle sensor connector.
      3. Ignition switch ON.
      4. Check the voltage between force motor angle sensor harness connector pin terminals.
        Force motor angle sensor Voltage(Approx.)
        Connector Terminals
        (+) (-)
        M330 3 7 5 V

    Is the inspection result normal?

    YES>>

    GO TO 6.

    NO>>

    GO TO 2.

  2. CHECK TEMPERATURE SENSOR POWER SUPPLY (2) 
    1. Check the voltage between force motor angle sensor harness connector and ground.
      (+) (-) Voltage(Approx.)
      Force motor angle sensor
      Connector Terminal
      M330 3 Ground 5 V

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    GO TO 4.

  3. CHECK TEMPERATURE SENSOR GROUND CIRCUIT 
      1. Ignition switch OFF.
      2. Disconnect steering force control module connector.
      3. Check the continuity between steering force control module harness connector and force motor angle sensor harness connector.
        Steering force control module Force motor angle sensor Continuity
        Connector Terminal Connector Terminal
        E141 29 M330 7 Yes

    Is the inspection result normal?

    YES>>

    GO TO 7.

    NO>>

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

  4. CHECK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 
      1. Ignition switch OFF.
      2. Disconnect steering force control module connector.
      3. Check the continuity between steering force control module harness connector and force motor angle sensor harness connector.
        Steering force control module Force motor angle sensor Continuity
        Connector Terminal Connector Terminal
        E141 31 M330 3 Yes
      4. Check the continuity between steering force control module harness connector and ground.
        Steering force control module - Continuity
        Connector Terminal
        E141 31 Ground No

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

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

  5. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT 
    1. Check the power supply circuit for steering force control module. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES>>

    GO TO 7.

    NO>>

    Repair or replace malfunctioning component.

  6. CHECK TEMPERATURE SENSOR 
    1. Check the force motor temperature sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES>>

    GO TO 7.

    NO>>

    Force motor temperature sensor is malfunctioning. Replace steering column assembly. Refer to Removal and Installation .

  7. CHECK INTERMITTENT INCIDENT 
      1. Check enlarged contact spring of terminal. Refer to How to Check Terminal .
      2. Perform intermittent incident while turning steering wheel. Refer to Intermittent Incident .

    Is the inspection result normal?

    YES>>

    Replace steering force control module. Refer to Removal and Installation .

    NO>>

    Repair or replace malfunctioning component.

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