Circuit Description
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
ETCS is composed of throttle control motor, Throttle Position (TP) sensor, accelerator position sensor, ECM and throttle body. If DTC P1129 is set, ECM shuts down power to throttle control motor. DTC P1129 is set when throttle opening angle continuously varies from normal range. Possible causes are:
- Electronic throttle control system.
- Faulty ECM.