Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when battery voltage does not exist at +BM terminal of ECM. Possible causes are:
- Defective fuse.
- Power source for ETCS circuit is open or shorted.
- Defective ECM.