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.
1996 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Door Open Detection Switch Circuit Test
- Open door. If courtesy light or door open warning light on dash comes on, circuit is okay. If light does not come on, leave ignition off. Turn remote door lock main switch to ON position. Leave electrical connector attached to remote door lock ECU.
- Check voltage between chassis ground and terminal No. 12 of remote door lock ECU connector (backprobe the terminal). See Figure. If voltage is 10-14 volts, circuit is okay. If voltage is not 10-14 volts, repair wiring circuit between remote door lock ECU and door open detection switch.
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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