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 (Diagnostics) >> Symptom Diagnosis >> Direct Adaptive Steering >> The Vehicle Pulls To One Side >> Diagnosis Procedure >> Direct Adaptive Steering System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Direct Adaptive Steering System

  1. CHECK THE ILLUMINATION OF THE POWER STEERING WARNING LAMP 
    1. Start the engine.
      CAUTION: Never drive the vehicle.
    2. Check that the power steering warning lamp turns OFF.

    Does the power steering warning lamp turn OFF?

    YES

    GO TO 2.

    NO

    Perform self-diagnosis for "EPS/DAST 3", "DAST 1" and "DAST 2".

  2. AUTO ADJUSTING MODE (1) 
    1. Turn the steering wheel to left/right 90 degree or more from center position 2 times.
    2. Drive straight ahead at around 30 km/h (19 MPH) for more than 5 seconds.
      CAUTION:
      • Drive on a straight flat road.
      • Keep the steering wheel, so the vehicle stays in a straight line.
      NOTE: Drive at between 30 km/h (19 MPH) and 40 km/h (25 MPH), as much as possible. It is easy to succeed with the work.
    3. Stop the vehicle.

    GO TO 3.

  3. SYMPTOM CONFIRMATION 

    Recheck the symptom and check that symptom is not reproduced on the same conditions.

    Is the symptom corrected?

    YES

    INSPECTION END

    NO

    GO TO 4.

  4. AUTO ADJUSTING MODE (2) 
    1. Drive straight ahead at 60 km/h (37 MPH) or more for more than 15 seconds.
      CAUTION:
      • Drive on a straight flat road.
      • Keep the steering wheel, so the vehicle stays in a straight line.
      NOTE: When the vehicle pulls to one side slightly, the driving at between 30 km/h (19 MPH) and 40 km/h (25 MPH) may not dissolve the symptom.
    2. Stop the vehicle.
    3. Repeat the driving and stopping 5 times.

    GO TO 5.

  5. SYMPTOM CONFIRMATION 

    Recheck the symptom and check that symptom is not reproduced on the same conditions.

    Is the symptom corrected?

    YES

    INSPECTION END

    NO

    GO TO 6.

  6. CHECK SUSPENSION AND STEERING PARTS INSTALLATION CONDITION 

    Check suspension and steering parts installation condition.

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Install suspension and steering parts properly. Then perform the toe-in adjustment.

  7. TOE-IN ADJUSTMENT 

    Adjust toe-in. Refer to WHEEL ALIGNMENT : Adjustment .

    GO TO 8.

  8. FINAL CHECK 

    Recheck the symptom and check that symptom is not reproduced on the same conditions.

    Is the symptom corrected?

    YES

    INSPECTION END

    NO

    GO TO 7.