Fail-Safe Chart

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: FAIL-SAFE CHART

1. FAIL SAFE OPERATION

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

The brake actuator turns off the solenoids and the ECM stops its VSC control 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, TR(A)C 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 control begins, VSC control will be prohibited. If a system component malfunctions during VSC control, the system will gradually stop performing the control so as not to trigger a sudden change in vehicle operation.

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

ABS, EBD and BA system:





HINT
A malfunction in either the ABS or BA system will result in identical operation with ABS, BA, TR(A)C and VSC system control being prohibited.

TR(A)C and VSC system:





HINT
As for the TR(A)C and VSC systems, different systems prohibit different controls depending on the malfunctioning component.