2004 Infiniti FX45FACTORY OEM SERVICE PROCEDURE

Procedure A

  1. Check Power Supply Circuit 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector E6.
    3. Check voltage between IPDM E/R terminal 16 and ground with CONSULT-II or tester.
      1. Voltage: Battery voltage 

    OK or NG

    1. OK: go to 3.
    2. NG: go to 2.
      Fig 1: Testing IPDM E/R Circuit (W/DVOM)
      G00345279Courtesy 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
      1. Repair open circuit or short to ground or short to power in harness or connectors.

  3. Check Cooling Fan Motor Circuit For Open Or Short 
    1. Disconnect IPDM E/R harness connector E5.
    2. Disconnect cooling fan motor harness connector.
    3. Check harness continuity between cooling fan motor terminal 1 and IPDM E/R terminal 11, cooling fan motor terminal 2 and IPDM E/R terminal 8.

      Refer to wiring diagram. See WIRING DIAGRAM  .

      1. Continuity should exist  .
    4. Also check harness for short to ground and short to power.

    OK or NG

    1. OK: go to 4.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors. See Figure .

  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. See WIRING DIAGRAM  .

      1. Continuity should exist  .
    2. Also check harness for short to power.

    OK or NG

    1. OK: go to 5.
    2. NG: Repair open circuit or short to power in harness or connectors.

  5. Check Cooling Fan Motor 

    Refer to COMPONENT INSPECTION  .

    OK or NG

    1. OK: go to 6.
    2. NG: Replace cooling fan motor.

  6. Check Intermittent Incident 

    Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

    OK or NG

    1. OK: Replace IPDM E/R. .
    2. NG: Repair or replace harness connectors.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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