2004 Infiniti M45FACTORY OEM SERVICE PROCEDURE

With CONSULT-II

  1. Check the coolant level in the reservoir tank and radiator.

    Allow engine to cool before checking coolant level.Β 

    If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to DIAGNOSTIC PROCEDUREΒ .

  2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to DIAGNOSTIC PROCEDUREΒ .
    Fig 1: Identifying Coolant Tank Fill Marks
    G00796367Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Start engine and make sure that the cooling fan operates. If not, go to DIAGNOSTIC PROCEDUREΒ .
  4. Select "TARGET FAN RPM" in "ACTIVE TEST" mode with CONSULT-II.
    Fig 2: Scan Tool Display - Active Test
    G00796368Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Change "TARGET FAN RPM" indication by touching "UP" and "DOWN", then make sure that the cooling fan operating speed changes according to "TRGT FAN RPM" indication.
  6. If the results are NG, go to DIAGNOSTIC PROCEDUREΒ .
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:

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

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