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Home >> Infiniti >> 2019 >> QX50 Pure, 4WD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System - Direct Adaptive Steering >> Basic Inspection >> Additional Service When Replacing Control Module >> Work Procedure
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Work Procedure

WARNING: Never move the vehicle during "DAST CALIBRATION (MODE1)" because the steering gear is held in neutral position until ignition switch is turned OFF.
CAUTION:
  • Be careful for the moving parts, steering wheel and front wheels are steered automatically when start "DAST CALIBRATION (MODE1)".
  • Do not rotate road wheels during the DAST calibration because the system is detected the vehicle running.
  1. CHECK OFF-CENTER (1) 

    SYMBOL CONSULT

    1. Set the vehicle to the straight-ahead position.
    2. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    3. On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"ST ANGLE SENSOR", and then and then check the value.

      Monitor item

      Standard value

      ST ANGLE SENSOR

      ST ANGLE SENSOR ≤+/-120 deg

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    • Refer to Diagnosis Procedure  to correct off-center and then, GO TO 2.
      CAUTION: Proceeding to the next step with off-center bigger than 120 deg causes the spiral cable to be torn off.
  2. PREPARATION 
    1. Set the front wheel on the turn table.
      NOTE: Do not lift up the vehicle during "DAST CALIBRATION (MODE1)"
    2. Connect the battery charger to protect the battery.
      NOTE: Much electricity is used in "DAST CALIBRATION (MODE1)".
    3. Connect the CONSULT.
    4. Turn the ignition switch ON.
      CAUTION: Never start the engine.

    GO TO 3.

  3. ECU CONFIGURATION 

    SYMBOL CONSULT

    1. Perform configuration for steering force control module. Refer to Work Procedure .
    2. Perform configuration for steering angle main control module. Refer to Work Procedure .
    3. Perform configuration for steering angle sub control module. Refer to Work Procedure .

    GO TO 4.

  4. PREPARATION BEFORE DAST CALIBRATION 

    Confirm that rear cap projection of steering gear is aligned in the center of the lower joint. Refer to -"INSPECTION AFTER INSTALLATION." Is the inspection result normal?

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair as necessary, GO TO 5.

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

    SYMBOL CONSULT

    1. Perform "DAST CALIBRATION (MODE1)". Refer to Description .
    2. Turn the ignition switch OFF.
      CAUTION: Be sure to perform this step.

    GO TO 6.

  6. CHECK OFF-CENTER (2) 

    SYMBOL CONSULT

    NOTE: This confirmation is procedure to confirm that the steering wheel is not rotated 360 deg when performing the DAST calibration.
    CAUTION: Proceeding to the next step with the steering wheel rotated 360 deg causes the spiral cable to be torn off.
    1. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    2. On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"ST ANGLE SENSOR", and then and then check the value.

      Monitor item

      Standard value

      ST ANGLE SENSOR

      ST ANGLE SENSOR ≤+/-20 deg

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    GO TO 7.

  7. CORRECT STEERING WHEEL NEUTRAL POSITION 

    SYMBOL CONSULT

    1. Separate steering upper shaft from steering clutch assembly. And then, turn the steering wheel to the direction that the value returns to 0 deg with checking "ST ANGLE SENSOR" on "DATA MONITOR".
    2. Connect steering clutch assembly and steering upper shaft. Refer to Removal and Installation .

    Re-perform the work from configuration to reset the learning information of clutch phase learning. GO TO 3.

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

    SYMBOL CONSULT

    Perform "DAST CALIBRATION (MODE1)". Refer to Description .

    GO TO 9.

  9. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION 

    SYMBOL 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.

    GO TO 10.

  10. PERFORM SELF-DIAGNOSIS 

    SYMBOL CONSULT

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Start the engine.
      CAUTION: Never drive the vehicle.
    3. Perform self-diagnosis for "EPS/DAST 3", "DAST 1" and "DAST 2".

    Is any DTC detected?

    YES

    When other than above DTC is detected, Perform trouble diagnosis for the detected DTC. Refer to DTC Index  (EPS/DAST 3), DTC Index  (DAST 1), DTC Index  (DAST 2).

    NO

    GO TO 11.

  11. FINAL CONFIRMATION 

    SYMBOL CONSULT

    1. Turn the ignition switch OFF to ON.
      CAUTION: Never start the engine.
    2. On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"ANGLE 1", and then and then check the value.

      Monitor item

      Standard value

      ANGLE 1

      -4.4 ≤ ANGLE 1 ≤ 4.4

    Is the confirmation result normal?

    YES

    Inspection End.

    NO

    Slightly lower the tilt position, and then re-perform Work Procedure .

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