Power Window Motor PTC Thermistor (Driver)
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the connector from the power window motor.
- Connect the positive (+) lead from the ammeter to terminal No. 1 on the wiring harness side connector and the negative (-) lead to negative terminal of the battery. See CONNECTOR IDENTIFICATION .
- Connect the positive (+) lead from the battery to terminal No. 2 on the wiring harness side connector, and raise the window to the fully closed position.
- Continue to apply voltage, and check that the current changes to less than 1 amp within 4-90 seconds.
- Disconnect the leads from the terminals.
- Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal No. 1 and negative (-) lead to terminal No. 2, and check that the window begins to descend. If operation is not as specified, replace the motor. See WINDOW REGULATOR (FRONT DOOR) under REMOVAL & INSTALLATION.