Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Infiniti M45FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

Check DTC
With CONSULT-II:
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF DIAG RESULTS" mode for "A/T" with CONSULT-II.
  
  Fig 1: Selecting "SELF DIAG RESULTS" Mode
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Touch "ERASE".
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform DTC confirmation procedure, " DTC CONFIRMATION PROCEDURE " .
Is the "TCM.ROM" displayed again?
1. YES : Replace TCM.
2. NO : Inspection end.

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.