Fail-Safe Chart

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for BOSCH Made): FAIL-SAFE CHART

1. FAIL SAFE OPERATION

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

(b) The brake actuator assembly turns off each solenoid and the ECM shuts off the VSC control (traction control signal) from the skid control ECU accordingly, which turns out to be as if the vehicle stability control system was not installed.

(c) The ABS, VSC, and TRAC controls will be prohibited, but EBD control continues as much as possible. If EBD control is impossible, the BRAKE warning light comes on to warn the driver Diagnosis System.





HINT
* A malfunction in either the ABS or BA system results in an identical operation, with ABS, BA, TRAC, and VSC system control prohibited.
* If control is prohibited due to a malfunction during operation, control will be disabled gradually to prevent the vehicle from becoming unstable suddenly.