LEMON Manuals: Even more car manuals for everyone: 1960-2025
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 >> DAST 1 >> DTC Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Diagnosis Procedure

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

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

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

  2. CHECK THE MOTOR CIRCUIT 
      1. Disconnect steering angle main control module connector and steering angle main motor connector.
      2. Check the continuity between steering angle main control module harness connector and steering angle main motor harness connector.
        Steering angle main control module Steering angle main motor Continuity
        Connector Terminal Connector Terminal
        E230 35 E237 2 Yes
        36 3
        37 1
      3. Check the continuity between steering angle main control module harness connector and ground.
        Steering angle main control module - Continuity
        Connector Terminal
        E230 35 Ground No
        36
        37
        E229 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 angle main control module. Refer to Removal and Installation .

    NO>>

    Repair or replace malfunctioning component.