The fail-safe mechanism prevents VSC and TRAC operations if a problem in the engine control system is detected via the Control Area Network (CAN). The fail-safe is deactivated and the Diagnostic Trouble Code (DTC) is saved when the signals from the engine are entered properly.
Toyota C1201 Possible Causes
1. Sequential Multiport Fuel Injection (SFI) System Problems
1. Anti-lock Braking System (ABS) Warning Light
2. Engine Light On (or Service Engine Soon Warning Light)