2004 Infiniti Q45FACTORY OEM SERVICE PROCEDURE

With CONSULT-II

NOTE: Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 l (7-7/8 US gal, 6-5/8 Imp gal) in advance.
  1. Prepare a fuel container and a spare hose.
  2. Release fuel pressure from fuel line, refer to FUEL PRESSURE RELEASE  .
  3. Remove the fuel feed hose on the fuel level sensor unit.
  4. Connect a spare fuel hose where the fuel feed hose was removed.
  5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
  6. Select "FUEL LEVEL SE" in "DATA MONITOR" mode with CONSULT-II.
  7. Check "FUEL LEVEL SE" output voltage and note it.
  8. Select "FUEL PUMP" in "ACTIVE TEST" mode with CONSULT-II.
  9. Touch "ON" and drain fuel approximately 30 l (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
  10. Check "FUEL LEVEL SE" output voltage and note it.
  11. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
  12. Check "FUEL LEVEL SE" output voltage and note it.
  13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12.

    If NG, check the fuel level sensor, refer to CHECK FUEL LEVEL SENSOR UNIT .

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.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

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.