Circuit Description
WARNING: This page is about a different car, the 2003 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
While engine is being cranked, battery positive voltage is applied to terminal STA of ECM. DTC will set if voltage is not present. See Fig 1. Possible causes are:
- Faulty starter relay.
- Faulty ignition switch.
- Faulty wire harness.
- Faulty ECM.