Circuit Description
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
If this malfunction is detected, ECM shuts down power for throttle motor, and throttle valve is fully closed by return spring. Throttle valve is locked at a certain opening angle. Also, all electronically controlled throttle operation is cancelled until system returns to normal and ignition switch is turned off. This electrical throttle system does not use a throttle cable. Possible causes are:
- Open in throttle control motor and sensor power source circuit.
- Defective ECM.