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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 543 (Heater & Air Conditioning Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Water Valve Circuit >> DTC Diagnosis Procedure >> Diagnostic Procedure For Water Valve

Diagnostic Procedure For Water Valve

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WATER VALVE POWER AND GROUND CIRCUITS 
    1. Disconnect water valve connector F24.
    2. Turn ignition switch ON.
    3. Rotate temperature control dial to full warm.
    4. Check voltage between water valve harness connector F24 terminal 1 and terminal 2 while rotating temperature control dial to full cool.

      Connector

      Terminals

      Condition

      Voltage

      (Approx.)

      (+)

      (-)

      Water valve: F24

      2

      1

      Rotate temperature control dial

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK WATER VALVE CONTROL OUTPUT CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect front air control connector M53.
    3. Check continuity between water valve harness connector F24 terminal 2 and front air control harness connector M53 terminal 9.

      2 - 9

      : Continuity should exist.
    4. Check continuity between water valve harness connector F24 terminal 2 and ground.

      2 - Ground

      : Continuity should not exist.

    Is the inspection result normal?

    YES

    Replace front air control. Refer to Removal and Installation - Front Air Control .

    NO

    Repair harness or connector.

  3. CHECK WATER VALVE POWER AND GROUND CIRCUITS 
    1. Rotate temperature control dial full cool.
    2. Check voltage between water valve harness connector F24 terminal 1 and terminal 2 while rotating temperature control dial to full warm.

      Connector

      Terminals

      Condition

      Voltage

      (Approx.)

      (+)

      (-)

      Water valve: F24

      1

      2

      Rotate temperature control dial

      Battery voltage

    Is the inspection result normal?

    YES

    Replace the water valve.

    NO

    GO TO 4.

  4. CHECK WATER VALVE CONTROL OUTPUT CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect front air control connector M53.
    3. Check continuity between water valve harness connector F24 terminal 1 and front air control harness connector M53 terminal 10.

      1 - 10

      : Continuity should exist.
    4. Check continuity between water valve harness connector F24 terminal 1 and ground.

      1 - Ground

      : Continuity should not exist.

    Is the inspection result normal?

    YES

    Replace front air control. Refer to Removal and Installation - Front Air Control .

    NO

    Repair harness or connector.

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