Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
Constant battery voltage is supplied to BATT terminal at ECM as the back-up power source. DTC is set when open in back-up power source is detected. Possible causes are:
- Back-up power source circuit is open.
- Defective ECM.