Fail-Safe Chart

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: FAIL-SAFE CHART

1. FAIL-SAFE OPERATION

* When trouble occurs in the brake control system, the skid control ECU turns the warning light on, and prohibits ABS, BA, and VSC operations.

* The skid control ECU prevents operation of a malfunctioning hydraulic pressure system and continues brake control with the normal hydraulic pressure system.

HINT
* If control of the electronically controlled brake system for any of the 4 wheels is prohibited, that wheel loses brake booster function or braking ability.
* If one of the 4 wheels loses brake booster function, the feeling when depressing the brake pedal changes as the stroke simulator (pedal reactive force generating solenoid) operation will be prohibited.
* If control of the electronically controlled brake system for all wheels is prohibited, the 2 front wheels will lose brake booster function.






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





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