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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) (1 Of 2) >> DTC/Circuit Diagnosis >> DTC C13B3-00: Control Module >> EPS/DAST 3 >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK THE MOTOR 

    Check the steering force motor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Steering force motor is malfunctioning. Replace steering column assembly. Refer to Removal and Installation .

  2. CHECK THE MOTOR CIRCUIT 
    1. Disconnect steering force control module connector.
    2. Check the continuity between steering force control module harness connector and ground.

      Steering force control module

      --

      Continuity

      Connector

      Terminal

      E153

      35

      Ground

      No

      36

      37

      E154

      38

    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 force control module. Refer to Removal and Installation .

    NO

    Repair or replace malfunctioning component.