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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Rear Final Drive: Ma248 (Eld)) >> Rear Final Drive: Ma248 (Eld) >> DTC/Circuit Diagnosis >> DTC P18CE: Differential Lock Position Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DIFFERENTIAL LOCK POSITION SWITCH GROUND CIRCUIT 

    Check the continuity between differential lock position switch harness connector and ground.

    1. Turn the ignition switch OFF.
    2. Disconnect differential lock position switch harness connector.
    3. Check the continuity between differential lock position switch harness connector and ground.

      Differential lock position switch

      -

      Continuity

      Connector

      Terminal

      C16

      2

      Ground

      Yes

    Is the inspection result normal?

    YES

    GO TO STEP 2  .

    NO

    Repair or replace damaged parts.

  2. CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL CIRCUIT 
    1. Disconnect differential lock control unit harness connector.
    2. Check the continuity between differential lock control unit harness connector and differential lock position switch harness connector.

      Differential lock control unit

      Differential lock position switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      B77

      12

      C16

      1

      Yes
    3. Check the continuity between differential lock control unit harness connector and ground.

      Differential lock control unit

      -

      Continuity

      Connector

      Terminal

      B77

      12

      Ground

      No

    Is the inspection result normal?

    YES

    GO TO STEP 3  .

    NO

    Repair or replace the malfunctioning parts.

  3. CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL 
    1. Connect differential lock control unit harness connector.
    2. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    3. Check the voltage between differential lock position switch harness connector and ground.

    Differential lock position switch

    -

    Voltage

    (Approx.)

    Connector

    Terminal

    C16

    1

    Ground

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO STEP 4  .

    NO

    Repair or replace the malfunctioning parts.

  4. CHECK DIFFERENTIAL LOCK POSITION SWITCH 

    Check differential lock position switch. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO STEP 5  .

    NO

    Replace differential lock position switch. Refer to Removal and Installation .

  5. CHECK TERMINALS AND HARNESS CONNECTORS 
    • Check differential lock control unit pin terminals for damage or loose connection with harness connector.
    • Check differential lock position switch pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    Replace differential lock control unit. Refer to Removal and Installation .

    NO

    Repair or replace the malfunctioning parts.

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