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Home >> Infiniti >> 2021 >> QX50 Essential, FWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (2 Of 2) >> DTC/Circuit Diagnosis >> DTC C13E6-00: Heat Protection >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK THE TEMPERATURE OF CONTROL MODULE 

    SYMBOL CONSULT

    1. Start the engine.
      CAUTION: Never drive the vehicle.
    2. On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"C/M TEMPERATURE".
    3. Wait with the ignition switch OFF until the data monitor indication becomes 140 deg. C (284 deg. F) or less.

    Does the temperature drop to 140 deg. C (284 deg. F) or less?

    YES

    GO TO 2.

    NO

    GO TO 3.

  2. PERFORM SELF-DIAGNOSIS 

    SYMBOL CONSULT

    1. Ignition switch ON.
    2. Erase "Self Diagnostic Result" mode of "EPS/DAST 3".
    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 "EPS/DAST 3".

    Is DTC "C13E6-00" detected?

    YES

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

    NO

    The rise of steering force motor internal temperature caused the protection function to operate. This is not a system malfunction. Inspection End

  3. CHECK TEMPERATURE SENSOR POWER SUPPLY (1) 
    1. Ignition switch OFF.
    2. Disconnect force motor angle sensor harness 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

      Terminal

      +

      -

      M330

      3

      7

      5 V

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    GO TO 4.

  4. CHECK TEMPERATURE SENSOR POWER SUPPLY (2) 

    Check the voltage between force motor angle sensor harness connector pin terminals.

    Force motor angle sensor

    --

    Voltage (Approx.)

    Connector

    Terminal

    +

    -

    M330

    3

    Ground

    5 V

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 7.

  5. CHECK TEMPERATURE SENSOR GROUND CIRCUIT 
    1. Ignition switch OFF.
    2. Disconnect steering force control module harness 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 6.

    NO

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

  6. CHECK CONTROL MODULE GROUND CIRCUIT 

    Check the continuity between steering force control module harness connector and ground.

    Steering angle main control module

    --

    Continuity

    Connector

    Terminal

    E149

    30

    Ground

    Yes

    E150

    34

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

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

  7. CHECK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 
    1. Ignition switch OFF.
    2. Disconnect steering force control module harness 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 8.

    NO

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

  8. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT 

    Check the power supply circuit for steering force control module. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

    Repair or replace malfunctioning component.

  9. CHECK TEMPERATURE SENSOR 

    Check the force motor temperature sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

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

  10. 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.