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 G20 Base, Automatic, RE4F03BFACTORY OEM SERVICE PROCEDURE
Door Unlock Sensor Check
- Measure voltage by backprobing between appropriate SECU terminals and ground. See DOOR UNLOCK SENSOR CHECK table. 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 Orange wire (front passenger door), Yellow/Red wire (front driver door) or Yellow wire (both rear doors) for open or short between SECU and door unlock sensor.
DOOR UNLOCK SENSOR CHECK
| Switch (Terminal No.) (1) | Condition | Voltage | ||
|---|---|---|---|---|
| Left Front Door (36) | ||||
| Unlocked | 0 Volts | |||
| Locked | About 12 Volts | |||
| Right Front Door (37) | ||||
| Unlocked | 0 Volts | |||
| Locked | About 12 Volts | |||
| Both Rear Doors (26) | ||||
| Unlocked | 0 Volts | |||
| Locked | About 12 Volts | |||
|
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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.