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.
2000 Nissan-Datsun Maxima GLE, RE4F04BFACTORY OEM SERVICE PROCEDURE
Key Switch Check
- Measure voltage by backprobing between Smart Entrance Control Unit (SECU) 24-pin connector terminal No. 32 (Black/Red wire) and ground. With ignition key inserted into lock cylinder, voltage should be about 12 volts. With ignition key removed from lock cylinder, voltage should be zero volts. If voltage is not as specified, go to next step. If voltage is as specified, key switch is okay.
- Disconnect key switch 2-pin connector located under steering column shroud. Check continuity between terminal No. 1 and 2. Continuity should be present with ignition key inserted into lock cylinder. Continuity should not be present with key removed from lock cylinder. If continuity is not as specified, replace key switch. If continuity is as specified, inspect the following:
- Fuse No. 12 (10-amp) located in fuse block under left side of instrument panel.
- Red/Black wire between key switch and fuse No. 12 for an open or short.
- Black/Red wire between key switch and SECU for an open or short.
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.
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