LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTCS) (1 Of 2) >> DAST 1 (Steering Angle Main Control Module) >> C13B2-00 Control Module >> DTC Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Diagnosis Procedure

  1. CHECK THE MOTOR 

    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 malfunction. Replace steering gear assembly. Refer to STEERING GEAR AND LINKAGE : Removal and Installation .

  2. CHECK THE MOTOR CIRCUIT 
    1. Disconnect steering angle main control module and steering angle main motor harness connector.
    2. Check the continuity between control module harness connector and motor harness connector.
      Steering angle main control module Steering angle main motor Continuity
      Connector Terminal Connector Terminal
      E97 35 E88*1
      E105*2
      1 Existed
      36 3
      37 2
      E98 38 E89 4

      *1: 2WD models

      *2: AWD models

    3. Check the continuity between control module harness connector and ground.
      Steering angle main control module - Continuity
      Connector Terminal
      E97 35 Ground Not existed
      36
      37
      E98 38

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair / replace harness or connector.

  3. CHECK INTERMITTENT INCIDENT 
    1. Check enlarged contact spring of terminal. Refer to Inspection .
    2. Perform intermittent incident while turning steering wheel. Refer to Inspection .

    Is the inspection result normal?

    YES>>

    Replace steering angle main control module. Refer to STEERING ANGLE MAIN CONTROL MODULE : Removal and Installation .

    NO>>

    Repair / replace harness, connector, or terminal.