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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) (1 Of 2) >> DTC/Circuit Diagnosis >> C13B6-00 Motor Circuit >> DAST 2 >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK THE MOTOR 
    1. Check the steering angle sub motor. Refer to Component Inspection .

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Steering angle sub motor is malfunctioning. Replace steering gear assembly. Refer to Removal and Installation .

  2. CHECK THE MOTOR CIRCUIT 
      1. Disconnect steering angle sub control module connector and steering angle sub motor connector.
      2. Check the continuity between steering angle sub control module harness connector and steering angle sub motor harness connector.
        Steering angle sub control module Steering angle sub motor Continuity
        Connector Terminal Connector Terminal
        E228 35 E235 2 Yes
        36 3
        37 1
      3. Check the continuity between steering angle sub control module harness connector and ground.
        Steering angle sub control module - Continuity
        Connector Terminal
        E228 35 Ground No
        36
        37
        E227 38

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair or replace malfunctioning component

  3. CHECK THE SENSOR CIRCUIT 
      1. Disconnect steering angle sub control module connector and sub motor angle sensor connector.
      2. Check the continuity between steering angle sub control module harness connector and sub motor angle sensor harness connector.
        Steering angle sub control module Sub motor angle sensor Continuity
        Connector Terminal Connector Terminal
        E144 10 E233 3 Yes
        11 6
        6 1
        5 5
        4 2
        2 4
      3. Check the continuity between steering angle sub control module harness connector and ground.
        Steering angle sub control module - Continuity
        Connector Terminal
        E144 10 Ground No
        11
        6
        5
        4
        2

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    Repair or replace malfunctioning component.

  4. 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 sub control module. Refer to Removal and Installation .

    NO>>

    Repair or replace malfunctioning component.

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