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.

2003 Infiniti M45FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

CHECK DTC
With CONSULT-II
1. Turn ignition switch to "ON" position and select "SELF DIAGNOSIS" mode for "A/T" with CONSULT-II.
2. Move selector lever to "R" position.
3. Depress accelerator pedal (Full throttle position).
4. Touch "ERASE".
5. Turn ignition switch to "OFF" position and wait at least 10 seconds.
6. Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".
Is the "TCM.EEPROM" displayed again?

YES >> Replace TCM.

NO >> INSPECTION END

Fig 1: Consult II Self Diagnosis Mode Display (DTC P1704)
Courtesy of NISSAN MOTOR CO., U.S.A.

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.