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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 670 (Wheel & Tire System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC C1734: BCM >> Diagnosis Procedure >> Wheel & Tire System (DTC/Circuit Diagnosis)

Wheel & Tire System (DTC/Circuit Diagnosis)

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK BCM HARNESS CONNECTORS 

    Check BCM harness connectors for damage or loose connections.

    Is the inspection result normal?

    YES

    Repair or replace connectors.

    NO

    GO TO 2.

  2. CHECK BCM POWER SUPPLY AND GROUND 

    Check BCM power supply and ground. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace harness or connectors.

  3. CHECK REMOTE KEYLESS ENTRY RECEIVER POWER CIRCUIT 

    Check voltage between remote keyless entry receiver connector M86 terminal 1 and ground.

    Remote keyless entry receiver

    Ground

    Voltage

    (Approx.)

    Connector

    Terminal

    M86

    1

    --

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace harness or connectors.

  4. CHECK REMOTE KEYLESS ENTRY RECEIVER SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector M80 and remote keyless entry receiver connector.
    3. Check continuity between BCM connector M80 terminal 119 and remote keyless entry receiver connector M86 terminal 2.

      BCM

      Remote keyless entry receiver

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M80

      119

      M86

      2

      Yes

    4. Check continuity between BCM connector M80 terminal 119 and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M80

      119

      --

      No

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace harness or connectors.

  5. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT 

    Check continuity between remote keyless entry receiver connector M86 terminal 3 and ground.

    Remote keyless entry receiver

    Ground

    Continuity

    Connector

    Terminal

    M86

    3

    --

    Yes

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace harness or connectors.

  6. CHECK BCM INPUT/OUTPUT SIGNALS 

    Check BCM input/output signals. Refer to Reference Value .

    Is the inspection result normal?

    YES

    Inspection End.

    NO

    Replace BCM. Refer to Removal and Installation .