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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Chassis Control System) >> Chassis Control >> DTC/Circuit Diagnosis >> U1A39-00 Combination Meter Communication >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN DIAGNOSIS SUPPORT MONITOR 

    SYMBOL CONSULT

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

    Check the result of "PRESENT"?

    Refer to CAN Communication Control Circuit .

    "TRANSMIT DIAG" is other than "OK"

    GO TO 2 .

    "METER/M&A" other than "OK"

    GO TO 3 .

  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 3 and 4 for damage or loose connection.

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    Recheck terminals for damage or loose connection. Refer to Precautions for Harness Repair . GO TO 5 .

  3. CHECK COMBINATION METER 
    1. Turn the ignition switch OFF.
    2. Disconnect combination meter harness connector.
    3. Check combination meter harness connector terminals (CAN communication line) or damage or loose connection.

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    Recheck terminals for damage or loose connection. Refer to Precautions for Harness Repair . GO TO 4 .

  4. PERFORM SELF-DIAGNOSIS (COMBINATION METER) 

    SYMBOL CONSULT

    1. Connect combination meter harness connector.
    2. Erase "Self diagnostic result" mode of "METER/M&A".
    3. Turn the ignition switch OFF and wait for 10 seconds or more.
    4. Turn the ignition switch ON.
    5. Select "Self diagnostic result" mode of "METER/M&A".

    Is DTC detected?

    YES

    Check the DTC. Refer to DTC Index .

    NO

    GO TO 5 .

  5. PERFORM SELF-DIAGNOSIS 

    SYMBOL CONSULT

    1. Connect chassis control module harness connector.
    2. Erase "Self diagnostic result" mode of "CHASSIS CONTROL".
    3. Turn the ignition switch OFF and wait for 10 seconds or more.
    4. Turn the ignition switch ON.
    5. Select "All DTC Reading" mode.

    Is DTC "U1000-00", "U1A39-00" or other DTC detected?

    YES

    Refer to Diagnosis Procedure .

    YES

    Replace the chassis control module. Refer to Removal and Installation .

    YES

    Check the DTC.

    NO

    Inspection End.

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