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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (DTC/Circuit Diagnosis) (2 Of 2) >> DTC/Circuit Diagnosis >> DTC C13D4-00: Control Module >> DAST 1 >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK THE ANGLE SENSOR 

    Check the main motor angle sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Main motor angle sensor is malfunctioning. Replace steering gear assembly. Refer to Removal and Installation .

  2. CHECK THE SENSOR CIRCUIT 
    1. Disconnect steering angle main control module connector and main motor angle sensor connector.
    2. Check the continuity between steering angle main control module harness connector and main motor angle sensor harness connector.

      Steering angle main control module

      Main motor angle sensor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E149

      10

      E232

      3

      Yes

      11

      6

      6

      1

      5

      5

      4

      2

      2

      4

    3. Check the continuity between steering angle main control module harness connector and ground.

      Steering angle main control module

      --

      Continuity

      Connector

      Terminal

      E149

      10

      Ground

      No

      11

      6

      5

      4

      2

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace malfunctioning component.

  3. 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 angle main control module. Refer to Removal and Installation .

    NO

    Repair or replace malfunctioning component.