Fail-Safe Chart

• When trouble occurs in the brake control system, the skid control ECU turns the warning light on, displays a DTC corresponding to the malfunctioning systems on the multi-information display, 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.