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 FX45FACTORY OEM SERVICE PROCEDURE
2. Check Key Switch Power Supply Circuit
- Remove mechanical key from ignition knob.
- Disconnect key switch and ignition knob switch connector.
- Check voltage between key switch and ignition knob switch connector M22 terminal 3 (L/R) and ground.
- 3 (L/R) - Ground : Battery voltage
Fig 1: Checking Voltage Between Key Switch And Ignition Knob Switch Connector M22 Terminal 3 (L/R) And Ground
OK or NG
OK : GO TO 3.
NG : Repair or replace key switch power supply circuit.
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.