Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fail-Safe Chart
- 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 (See 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 (See DIAGNOSIS SYSTEM ).
ABS, EBP and BA system:
MALFUNCTIONING AREA REFERENCE CHARTMalfunctioning Area Control Method ABS system ABS, BA, TR(A)C and VSC control prohibited BA system ABS, BA, TR(A)C and VSC control prohibited EBD system ABS, EBD, BA, TR(A)C and VSC control prohibited 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:
MALFUNCTIONING AREA REFERENCE CHARTMalfunctioning Area Control Method Engine control system (TR(A)C and VSC systems) Before control: Disables control
During control: Uses only the brakes to effect controlBrake control system (VSC system) Before control: Disables control
During control: Uses only the engine to effect controlBrake control system (TR(A)C system) Before control: Disables control
During control: Disables control (by gradually ending control)HINT:
As for the TR(A)C and VSC systems, different systems prohibit different controls depending on the malfunctioning component.
- 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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