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Home >> Infiniti >> 2024 >> 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 >> C13B3-00 Control Module >> EPS/DAST 3 >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK THE MOTOR 
    1. 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.