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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Driver Assistance System (Chassis Control) (Exc Hybrid) >> DTC/Circuit Diagnosis >> DTC U1A30-00: Direct Adaptive Steering Communication >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK CAN DIAGNOSIS SUPPORT MONITOR

    With CONSULT

    1. Select "CAN Diagnosis Support Monitor" of "CHASSIS CONTROL".
    2. Check malfunction history between each control unit connected to chassis control module.

    Check the result of "PAST"?

    All items are "OK" 

    Refer to INTERMITTENT INCIDENT .

    "TRANSMIT DIAG" is other than "OK" 

    GO TO STEP 2  .

    "EPS/DAST 3" other than "OK" 

    GO TO STEP 3  .

    "DAST 1" other than "OK" 

    GO TO STEP 4  .

  2. CHECK TRANSMITTING SIDE UNIT

    1. Turn the ignition switch OFF.
    2. Disconnect chassis control module harness connector.
    3. Check the chassis control module harness connector terminals No. and for damage or loose connection. (CAN communication line)
    4. Check the chassis control module harness connector terminals No. for damage or loose connection. (Chassis communication line)

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Recheck terminals for damage or loose connection. Refer to PRECAUTIONS FOR HARNESS REPAIR , and GO TO STEP 7  .

  3. CHECK STEERING FORCE CONTROL MODULE

    1. Turn the ignition switch OFF.
    2. Disconnect steering force control module harness connector.
    3. Check steering force control module harness connector terminals (CAN communication line) or damage or loose connection.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Recheck terminals for damage or loose connection. Refer to PRECAUTIONS FOR HARNESS REPAIR , and GO TO STEP 5  .

  4. CHECK STEERING ANGLE MAIN CONTROL MODULE

    1. Turn the ignition switch OFF.
    2. Disconnect steering angle main control module harness connector.
    3. Check steering angle main control module harness connector terminals (chassis communication line) or damage or loose connection.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Recheck terminals for damage or loose connection. Refer to PRECAUTIONS FOR HARNESS REPAIR , and GO TO STEP 6  .

  5. PERFORM SELF-DIAGNOSIS (STEERING FORCE CONTROL MODULE)

    With CONSULT

    1. Connect steering force control module harness connector.
    2. Erase self-diagnosis result for "EPS/DAST 3".
    3. Turn the ignition switch OFF and wait for 10 seconds or more.
    4. Turn the ignition switch ON.
    5. Perform self-diagnosis for "EPS/DAST 3".

    Is DTC detected?

    YES 

    Check the DTC. Refer to DTC INDEX .

    NO 

    GO TO STEP 7  .

  6. PERFORM SELF-DIAGNOSIS (STEERING ANGLE MAIN CONTROL MODULE)

    With CONSULT

    1. Connect steering angle main control module harness connector.
    2. Erase self-diagnosis result for "DAST 1".
    3. Turn the ignition switch OFF and wait for 10 seconds or more.
    4. Turn the ignition switch ON.
    5. Perform self-diagnosis for "DAST 1".

    Is DTC detected?

    YES 

    Check the DTC. Refer to DTC INDEX .

    NO 

    GO TO STEP 7  .

  7. PERFORM SELF-DIAGNOSIS

    With CONSULT

    1. Erase self-diagnosis result for "CHASSIS CONTROL".
    2. Turn the ignition switch OFF and wait for 10 seconds or more.
    3. Turn the ignition switch ON.
    4. Perform "All DTC Reading".

    Is DTC "U1000 - 00", "U1A30 - 00" or other DTC detected?

    YES ("U1000 - 00") 

    Refer to TROUBLE DIAGNOSIS FLOW CHART .

    YES ("U1A30 - 00") 

    Replace the chassis control module. Refer to REMOVAL AND INSTALLATION .

    YES (other DTC) 

    Check the DTC.

    NO 

    INSPECTION END

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