LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (DTCS) (2 Of 2) >> DAST 2 (Steering Angle Sub Control Module) >> DTC C13B9-00: Control Module >> DTC Diagnosis Procedure >> Direct Adaptive Steering System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Direct Adaptive Steering System

  1. CHECK THE MOTOR 

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

  2. CHECK THE MOTOR CIRCUIT 
    1. Disconnect steering angle sub control module and steering angle sub motor harness connector.
    2. Check the continuity between control module harness connector and motor harness connector.

      Steering angle sub control module

      Steering angle sub motor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E99

      35

      E90

      1

      Existed

      36

      3

      37

      2

      E100

      38

      E91 *1

      E242 *2

      4

      *1: 2WD models

      *2: AWD models

    3. Check the continuity between control module harness connector and ground.

      Steering angle sub control module

      --

      Continuity

      Connector

      Terminal

      E99

      35

      Ground

      Not existed

      36

      37

      E100

      38

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace error-detected part.

  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 sub control module. Refer to STEERING ANGLE SUB CONTROL MODULE : Removal & Installation .

    NO

    Repair or replace error-detected part.