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.
1999 Camry
With ignition switch in OFF position, remove wireless door lock ECU from below radio. See Figure. Place all door lock knobs in lock position (door unlock detection switch off). Measure voltage between ground and ECU connector terminals No. 11 (Blue/Red wire), No. 12 (Yellow wire) and No. 13 (Blue/Yellow wire). See Figure. Battery voltage should exist at each individual voltage reading. If battery voltage does not exist, repair appropriate circuit. If battery voltage exists, proceed to next test given under ALL FUNCTIONS OF KEYLESS ENTRY DO NOT WORK under TROUBLE SHOOTING.
NO RELATED
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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.