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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Steering Control System (Direct Adaptive Steering) (Symptom Diagnosis & Removal And Installation) (Except Hybrid)) >> Symptom Diagnosis >> Big Off-Center Occurs >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  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 STEP 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 STEP 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 STEP 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 STEP 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 STEP 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 battery charger to protect the 12V battery.
      NOTE:

      Much electricity is used in "DAST CALIBRATION (MODE1)".

    GO TO STEP 7  .

  7. CORRECT STEERING WHEEL POSITION

    G-20With CONSULT 

    1. Remove steering upper shaft mounting bolt (steering clutch assembly side). Refer to REMOVAL AND 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 MARU-A-W on steering upper shaft WHITE-1 . When the steering upper shaft is separated, use matching marks.
        G09164919Courtesy of NISSAN NORTH AMERICA, INC.
    2. Move steering upper shaft WHITE-1 to the steering column side to separate it from steering clutch assembly.
      G09164930Courtesy 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 STEP 8  .

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

    G-20With CONSULT 

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

    CAUTION:

    Never release the hand from the steering wheel.

    GO TO STEP 9  .

  9. CONNECT STEERING UPPER SHAFT

    G-20With 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 REMOVAL AND 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 STEP 10  .

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

    G-20With CONSULT 

    1. Turn the ignition switch ON.
      CAUTION:

      Never start the engine.

    2. Perform "DAST CALIBRATION (MODE1)". Refer to DESCRIPTION .

    GO TO STEP 11  .

  11. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

    G-20With 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 approx. 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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