Circuit Description
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Battery voltage is supplied to +BM circuit at ECM as the power source for the Electronic Throttle Control System (ETCS). DTC is set if battery voltage does not exist on +BM circuit at ECM for ETCS. If DTC P2118 exists, ECM will turn off the power to throttle control motor and throttle valve is closed by the return spring. The throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is cancelled until the system returns to normal and the ignition switch is turned OFF. Possible causes are:
- ETCS power source circuit is open.
- Defective ECM.