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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (6 Of 6)) >> DTC/Circuit Diagnosis >> Cooling Fan >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DRIVE BELT 
    1. Turn ignition switch OFF.
    2. Check that the drive belt is not broken.

    Is inspection result normal?

    YES

    GO TO 2.

    NO

    Replace drive belt.

  2. CHECK FAN CLUTCH ASSEMBLY POWER SUPPLY 
    1. Disconnect the fan clutch assembly harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between the fan clutch assembly harness connector and ground.

      +

      -

      Voltage

      (Approx.)

      Fan clutch assembly

      Connector

      Terminal

      F97

      1

      Ground

      Battery voltage

    Is inspection result normal?

    YES

    GO TO 3.

    NO

    Perform trouble diagnosis for power supply circuit.

  3. CHECK FAN CLUTCH ASSEMBLY GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check the continuity between the fan clutch assembly harness connector and ground.

      +

      -

      Continuity

      Fan clutch assembly

      Connector

      Terminal

      F97

      6

      Ground

      Existed

    Is inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK FAN CLUTCH ASSEMBLY CONTROL SIGNAL 

    SYMBOL WITH CONSULT

    1. Start the engine.
    2. Perform "FAN DUTY CONTROL" in "ACTIVE TEST" mode of "ECM" with CONSULT.
    3. Set the Duty value to 100%.
    4. Check the voltage between the fan clutch assembly harness connector and ground.
      CAUTION: Wait for 1 minute or more to measure.

      +

      -

      Voltage

      (Approx.)

      Fan clutch assembly

      Connector

      Terminal

      F97

      3

      Ground
      GNSJMMIA0404GB-404Courtesy of NISSAN NORTH AMERICA, INC.

      2. 5 V

    SYMBOL WITHOUT CONSULT

    1. Start the engine and warm up the engine until engine coolant temperature reaches at least 98 deg.C (209 deg.F).
    2. Check the voltage between the fan clutch assembly harness connector and ground.
      CAUTION: Wait for 1 minute or more to measure.

      +

      -

      Voltage

      (Approx.)

      Fan clutch assembly

      Connector

      Terminal

      F97

      3

      Ground
      GNSJMMIA0404GB-404Courtesy of NISSAN NORTH AMERICA, INC.

      2. 5 V

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 5.

  5. CHECK FAN CLUTCH ASSEMBLY CONTROL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between the fan clutch assembly harness connector and IPDM E/R harness connector.

      +

      -

      Continuity

      Fan clutch assembly

      IPDM E/R

      Connector

      Terminal

      Connector

      Terminal

      F97

      3

      E119

      9

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK CAN COMMUNICATION 

    Refer to Trouble Diagnosis Flow Chart .

    Is inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or Replace error-detected parts.

  7. CHECK COOLING FAN SPEED SENSOR 

    Refer to Diagnosis Procedure .

    Is inspection result normal?

    YES

    Replace the fan clutch assembly. Refer to Removal and Installation (Motor driven type) .

    NO

    Repair or replace error-detected parts.

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