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.
Motor Positive Temperature Coefficient (PTC) Thermistor Operation
2004 Toyota Celica GT, StandardSECTION Motor Positive Temperature Coefficient (PTC) Thermistor Operation
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Remove door panel for access to suspect power window motor. See Figure. On driver door, disconnect 6-pin electrical harness connector from power window motor. On front passenger and both rear doors, disconnect 2-pin electrical harness connector from power window motor.
- Connect positive ammeter lead to power window motor terminal No. 1 and negative ammeter lead to battery negative voltage. Using jumper wires, apply battery positive voltage to power window motor terminal No. 2. See Fig 1. Monitor ammeter reading as motor moves window to fully closed position. Continue to apply voltage and ensure current changes to less than one amp within 4-90 seconds of window reaching fully closed position.
- After 60 seconds, disconnect ammeter leads and use jumper wires to connect battery positive voltage to power window motor terminal No. 1 and battery negative voltage to terminal No. 2. Power window should begin to lower. Replace power window motor if operation is not as specified.
RENDER: 1.0x
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.