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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (Diagnostics) >> Symptom Diagnosis >> Direct Adaptive Steering >> Big Off-Center Occurs >> Diagnosis Procedure >> Direct Adaptive Steering System
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Direct Adaptive Steering System

The off-center bigger than 120 deg. occurs.

NOTE: This procedure is for preventing the spiral cable from being torn off when replacing the direct adaptive steering related parts.
CAUTION: Never perform the replacement of control module, the configuration, or the DAST calibration, with off-center bigger than 120 deg..
  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) or more 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. PREPARATION 
    1. Set the front wheel on the turn table.
      NOTE: Do not lift up the vehicle during "DAST CALIBRATION (MODE1)"
    2. Set the front wheel to the straight-ahead position.
    3. Connect the 12 V battery charger to protect the 12 V battery.
      NOTE: Much electricity is used in "DAST CALIBRATION (MODE1)".

    GO TO 7.

  7. CORRECT STEERING WHEEL POSITION 

    SYMBOL With CONSULT

    1. Remove steering upper shaft mounting bolt (steering clutch assembly side). Refer to STEERING SHAFT : Removal & Installation .
      CAUTION:
      • When removing steering column assembly, fix the steering upper shaft using wire etc., because steering upper shaft may separate the steering column side and steering clutch side. Never separate steering upper shaft steering column side and steering clutch side.
      • Place a matching marks SYMBOL on steering upper shaft SYMBOL . When the steering upper shaft is separated, use matching marks.
        GNSJSGIA1365Z-365Courtesy of NISSAN NORTH AMERICA, INC.
    2. Move steering upper shaft SYMBOL to the steering column side to separate it from steering clutch assembly.
      GNSJSGIA1550Z-550Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: When separating steering upper shaft, never insert a tool, such as a screwdriver, into the yoke groove to pull out the steering upper shaft. In the case of the violation of the above, replace steering upper shaft with a new one.
    3. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    4. On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"ST ANGLE SENSOR", and then check the value.
    5. Turn the steering wheel until the value is 0 deg.

    GO TO 8.

  8. DAST CALIBRATION (MODE1) [CLUTCH PHASE LEARNING] 

    SYMBOL With CONSULT

    Perform "DAST CALIBRATION (MODE1)" while holding the steering wheel with hand. Refer to Work Procedure .

    CAUTION: Never release the hand from the steering wheel.

    GO TO 9.

  9. CONNECT STEERING UPPER SHAFT 

    SYMBOL With CONSULT

    1. After the movement of front wheel stops and then the steering clutch assembly is released by DAST calibration, connect the steering upper shaft to steering clutch assembly. Refer to STEERING SHAFT : Removal & Installation .
      CAUTION: About the aligning, turn the shaft part of steering clutch assembly by hand.
      NOTE: About the direction of rotation, both is OK. Because the shaft part of steering clutch is free in this timing.
    2. Select "END".
    3. Turn ignition switch OFF.
      CAUTION: Be sure to perform this step.

    GO TO 10.

  10. DAST CALIBRATION (MODE1) [STEERING RACK NEUTRAL POSITION LEARNING] 

    SYMBOL With CONSULT

    1. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    2. Perform "DAST CALIBRATION (MODE1)". Refer to Work Procedure .

    GO TO 11.

  11. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION 

    SYMBOL With CONSULT

    1. On the CONSULT screen, select "ABS">>"WORK SUPPORT">>"ST ANGLE SENSOR ADJUSTMENT".
    2. Touch START.
      CAUTION: Never touch steering wheel while adjusting steering angle sensor.
    3. After approximately 10 seconds, select "END".
    4. Turn ignition switch OFF, and then turn it ON again.
      CAUTION: Be sure to perform this step.

    WORK END

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