Fail-Safe Chart
- FAIL-SAFE OPERATION
- If there is a problem with any sensor signals or actuator, the skid control ECU prohibits the power supply to the brake actuator and informs the ECM of VSC system failure.
The brake actuator turns off the solenoids and the ECM shuts off VSC control (traction control signal) from the skid control ECU accordingly, the result being that it is as if the ABS, TRAC and VSC systems were not installed.
- ABS control is prohibited, but EBD control continues as far as possible. If EBD control is impossible, the BRAKE warning light comes on to warn the driver (See DIAGNOSIS SYSTEM ).
- If system components have any malfunctions before starting control, the operation stops immediately. If system components have any malfunctions during control, the control stops gradually so as not to trigger a sudden change in vehicle conditions.
If it is impossible to control the systems, the warning/ indicator lights come on to inform the driver of malfunctions in the systems (See DIAGNOSIS SYSTEM ).
ABS, EBP and BA System
ABS, EBP AND BA SYSTEM REFERENCE CHARTMalfunction Area Fail-Safe Operation ABS system ABS, BA, TRAC and VSC control prohibited BA system ABS, BA, TRAC and VSC control prohibited EBD system ABS, EBD, BA, TRAC and VSC control prohibited TRAC and VSC System:
TRAC AND VSC SYSTEM REFERENCE CHARTMalfunction Area Fail-Safe Operation Engine control system (TRAC and VSC systems) Before control: Disables control
During control: Uses only the brakes to perform controlBrake control system (VSC system) Before control: Disables control
During control: Uses only the engine to perform controlBrake control system (TRAC system) Before control: Disables control
During control: Disables control (by gradually ending control) - If there is a problem with any sensor signals or actuator, the skid control ECU prohibits the power supply to the brake actuator and informs the ECM of VSC system failure.