Fail-Safe Chart

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: FAIL-SAFE CHART

1. FAIL SAFE OPERATION

If there is a problem with sensor signals or brake actuator systems, the skid control ECU prohibits power supply to the brake actuator and informs the ECM of VSC system failure.

The brake actuator turns off the solenoids and the ECM stops its VSC according to signals from the skid control ECU. The vehicle will operate in a manner similar to a vehicle that is not equipped with ABS, TRAC and VSC systems.

ABS control will be prohibited, but EBD control will continue to the extent that EBD control is possible. If EBD control is impossible, the brake warning light will come on to warn the driver Diagnosis System.

If a VSC system component malfunctions before VSC begins, VSC will be prohibited. If a system component malfunctions while VSC is operating, the system will gradually stop operating so as not to trigger a sudden change in vehicle stability.

If it is impossible to control the systems, the warning light will come on to inform the driver of system control termination Diagnosis System.

HINT
For vehicles with the multi-information display, the master warning light will come on and a warning message will be displayed on the multi-information display if any of the EBD system, BA system, or TRAC system is malfunctioning or if the ABS control or VSC cannot be performed.

ABS, EBD and BA System





HINT
A malfunction in either the ABS or BA system will result in identical operation, with ABS, BA, TRAC, VSC system control being prohibited.

TRAC and VSC System





HINT
The TRAC and VSC systems use different systems to prohibit different controls depending on the malfunctioning parts.