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 Infiniti I30 Base, RE4F04BFACTORY OEM SERVICE PROCEDURE
Driver's Door Unlock Sensor Check
- Measure voltage by backprobing between terminal No. 36 (Light Green/Red wire) on SECU 24-pin harness connector and ground. See Figure . Voltage should be zero volts with door unlocked and about 5 volts with door locked. If voltages are not as specified, go to next step. If voltages are as specified, door unlock sensor is okay.
- Perform door unlock sensor test. See SENSORS under COMPONENT TESTS. If sensor is okay, inspect unlock sensor ground circuit (Black wire) and/or Light Green/Red wire for open or short between SECU and driver's door unlock sensor.
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.