Fail-Safe Chart

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

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.

ABS, EBD and BA system:





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.

TR(A)C and VSC system:





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