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Procedure A

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK COOLING FAN POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connectors E120.
    3. Check voltage between IPDM E/R terminal 22 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK : GO TO  3.

    NG : GO TO  2.

    Fig 1: Identifying Voltage Between IPDM E/R Terminal 22 And Ground
    G04203101Courtesy of NISSAN MOTOR CO., U.S.A.
  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • 40A fusible link
    • Harness for open or short between IPDM E/R and battery

      : Repair open circuit or short to ground in harness or connectors.

  3. CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect IPDM E/R harness connectors E120, E124.
    2. Disconnect cooling fan motor harness connector.
    3. Check harness continuity between the following;

      cooling fan motor terminal 1 and IPDM E/R terminal 20, cooling fan motor terminal 2 and IPDM E/R terminal 24.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    4. Also check harness for short to ground and short to power.

    OK or NG 

    OK : GO TO  4.

    NG : Repair open circuit or short to ground or short to power in harness or connectors.

    Fig 2: Identifying Cooling Fan Motor Harness Connector
    G04203102Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK COOLING FAN MOTOR GROUND CIRCUIT FOR OPEN OR SHORT 
    1. Check harness continuity between the following;

      cooling fan motor terminal 3 and ground, cooling fan motor terminal 4 and ground.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    2. Also check harness for short to power.

    OK or NG 

    OK : GO TO  5.

    NG : Repair open circuit or short to power in harness or connectors.

  5. CHECK COOLING FAN MOTOR 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK : GO TO  6.

    NG : Replace cooling fan motor.

  6. CHECK INTERMITTENT INCIDENT 

    Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    OK or NG 

    OK : Replace IPDM E/R. Refer to "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ".

    NG : Repair or replace harness or connector.

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