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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (DTC/Circuit Diagnosis) (2 Of 2) >> DTC/Circuit Diagnosis >> C13E9-00 Booting Angle Processing >> DAST 1 >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK THE SELF-DIAGNOSTIC RESULT 
    1. SYMBOL CONSULT
      1. Start the engine.
        CAUTION:

        Never drive the vehicle.

      2. Select "Self Diagnostic Result" mode of "EPS/DAST 3" and "DAST 2".
      3. Check the diagnostic result for "EPS/DAST 3", "DAST 1" and "DAST 2".

    What is DTC detected?

    Except C13E9-00, C13EB-00, C13EE-00, C13EF-00, C13F0-00, C13F1-00 or C13F2-00>>

    Refer to DTC Index (EPS/DAST 3), DTC Index (DAST 1), DTC Index (DAST 2).

    C13EE-00, C13EF-00, C13F0-00, C13F1-00 or C13F2-00>>

    GO TO 4.

    C13E9-00 or C13EB-00>>

    GO TO 2.

  2. AUTO ADJUSTING MODE (1) 
      1. Drive straight ahead at around 20 MPH (32 km/h) or more for more than 5 seconds.
        CAUTION:
        • Check the safety operation of the vehicle before driving.
        • Bumps, pot holes, or other steering input may affect the calibration. Drive on a straight flat road.
        • Keep the steering wheel, so the vehicle stays in a straight line.
        • Traffic condition that requires steering input may affect the calibration. Drive on a road with very light or no traffic.
        NOTE: SYMBOL Drive at 40 MPH (65 km/h) or less, as much as possible. It is easy to succeed with the work.
      2. Stop the vehicle.
      3. Ignition switch OFF and then start the engine.

    Does the power steering warning lamp turn OFF?

    YES>>

    Inspection End.

    NO>>

    Steering wheel is not off-center: Repeat the step 1-3 (driving - placing ignition switch OFF/ON) 5 times until the warning lamp turns OFF. When the waning lamp does not turn OFF, GO TO 3.

    NO>>

    Steering wheel is off-center: GO TO 3.

  3. AUTO ADJUSTING MODE (2) 
      1. When the vehicle has not yet stopped, stop the vehicle on the safety place.
      2. Ignition switch OFF, and then place it ON again.
      3. Turn the steering wheel to the center position.
      4. Turn the steering wheel to left/right 90 degree or more from center position 2 times.
      5. Drive straight ahead at around 20 MPH (32 km/h) or more for more than 5 seconds.
        CAUTION:
        • Check the safety operation of the vehicle before driving.
        • Bumps, pot holes, or other steering input may affect the calibration. Drive on a straight flat road.
        • Keep the steering wheel, so the vehicle stays in a straight line.
        • Traffic condition that requires steering input may affect the calibration. Drive on a road with very light or no traffic.
        NOTE: SYMBOL Drive at 40 MPH (65 km/h) or less, as much as possible. It is easy to succeed with the work.
      6. During driving the vehicle, turn the steering wheel to the center position slowly.
      7. Stop the vehicle.
      8. Ignition switch OFF and then start the engine.

    Does the power steering warning lamp turn OFF?

    YES>>

    Inspection End.

    NO>>

    Repeat the step 3-8 (driving - placing ignition switch OFF/ON) 5 times until the warning lamp turns OFF. When the waning lamp does not turn OFF, GO TO 4.

  4. PREPARATION 
      1. Set the front wheel on the turn table.
        NOTE: SYMBOL Do not lift up the vehicle during "DAST CALIBRATION (MODE1)"
      2. Connect the battery charger to protect the 12V battery.
        NOTE: SYMBOL "DAST CALIBRATION (MODE1)" has a high current draw.
      3. Connect the CONSULT.
      4. Ignition switch ON.
        CAUTION:

        Never start the engine.

    >>

    GO TO 5.

  5. ECU CONFIGURATION 
    1. SYMBOL CONSULT
      1. Perform configuration for steering force control module. Refer to Work Procedure .
        NOTE: SYMBOL The replacement of control module included in configuration is not required.
      2. Perform configuration for steering angle main control module. Refer to Work Procedure .
        NOTE: SYMBOL The replacement of control module included in configuration is not required.
      3. Perform configuration for steering angle sub control module. Refer to Work Procedure .
        NOTE: SYMBOL The replacement of control module included in configuration is not required.

    >>

    GO TO 6.

  6. PREPARATION BEFORE DAST CALIBRATION 
    1. Confirm that rear cap projection of steering gear is aligned in the center of the lower joint. Perform "INSPECTION AFTER INSTALLATION." Refer to Removal and Installation .

    Is the inspection result normal?

    YES>>

    GO TO 7.

    NO>>

    Repair as necessary, GO TO 7.

  7. DAST CALIBRATION (MODE1) [CLUTCH PHASE LEARNING] 
    1. SYMBOL CONSULT
      1. Perform "DAST CALIBRATION (MODE1)". Refer to Description .
      2. Ignition switch OFF.
        CAUTION:

        Be sure to perform this step.

    >>

    GO TO 8.

  8. DAST CALIBRATION (MODE1) [STEERING RACK NEUTRAL POSITION LEARNING] 
    1. SYMBOL CONSULT
      1. Ignition switch ON.
        CAUTION:

        Never start the engine.

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

    >>

    GO TO 9.

  9. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION 
    1. SYMBOL CONSULT
      1. Select "ST ANGLE SENSOR ADJUSTMENT" in "Work support" mode of "ABS".
      2. Select "Start".
        CAUTION:

        Never touch steering wheel while adjusting steering angle sensor.

      3. After approx. 10 seconds, select "End".
      4. Ignition switch OFF, and then place it ON again.
        CAUTION:

        Be sure to perform this step.

    >>

    GO TO 10.

  10. PERFORM SELF-DIAGNOSIS 
    1. SYMBOL CONSULT
      1. Ignition switch OFF and wait at least 10 seconds.
      2. Start the engine.
        CAUTION:

        Never drive the vehicle.

      3. Select "Self Diagnostic Result" mode of "DAST 1".

    Is DTC "C13E9-00" detected?

    YES>>

    Replace steering angle main control module, steering angle sub control module and steering force control module. Refer to Removal and Installation (steering force control module), Removal and Installation (steering angle main control module), Removal and Installation (steering angle sub control module). After replacing the control modules, confirm that DTC "C13E9-00" is not detected.

    NO>>

    Inspection End.