Fail-Safe Chart

• If there is a problem with sensor signals or brake actuator systems, the skid control ECU prohibits power from being supplied 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 that of 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. Refer to DIAGNOSIS SYSTEM .

• If a system component has any malfunction before control begins, operation is prohibited. If a system component has any malfunction during control, the system will gradually stop operating so as not to trigger a sudden change in vehicle conditions. If it is impossible to control the systems, the warning light comes on to inform the driver of termination of control of the systems. Refer to DIAGNOSIS SYSTEM .
• VSC control continues as much as possible while the TRAC OFF indicator light is on even when the engine has failed.

HINT: 

If the brake booster encounters a malfunction, brake performance is gradually lost and ABS, BA, TRAC and VSC systems are prohibited.

HINT: 

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