2004 Infiniti M45FACTORY OEM SERVICE PROCEDURE

Without 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 .
  3. Start engine.

    Be careful not to overheat engine.Β 

  4. Make sure that the cooling fan operates. If not, go to DIAGNOSTIC PROCEDUREΒ .
    Fig 1: Visually Inspecting Fan Operates
    G00796369Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Turn ignition switch OFF.
  6. Disconnect radiator coolant temperature sensor harness connector.
  7. Connect 2.2KΞ© resistor to engine coolant temperature sensor harness connector.
  8. Restart engine and make sure that cooling fan operates at higher speed than the speed at step 4.
    Fig 2: Checking Cooling Fan Operates At A Higher Speed
    G00796370Courtesy of NISSAN MOTOR CO., U.S.A.

    Be careful not to overheat engine.Β 

  9. If NG, go to DIAGNOSTIC PROCEDUREΒ .
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.