Vehicle Stability Control System Fail-Safe Chart

Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. FAIL-SAFE OPERATION

Vehicle Stability Control System -- Fail-Safe Chart



FAIL-SAFE OPERATION
  1. If there is a problem with any sensor signals or actuator, the skid control ECU prohibits the power supply to the brake actuator and informs the ECM of VSC system failure.
    The brake actuator turns off the solenoids and the ECM shuts off VSC control (traction control signal) from the skid control ECU accordingly, the result being that it is as if the ABS, TRC and VSC systems were not installed.
  2. ABS control is prohibited, but EBD control continues as far as possible. If EBD control is impossible, the brake warning light comes on to warn the driver (RAV4_ACA30 RM000000ONI01NX.html).
  3. If system components have any malfunctions before starting control, the operation stops immediately. If system components have any malfunctions during control, the control stops gradually so as not to trigger a sudden change in vehicle conditions.
    If it is impossible to control the systems, the warning/indicator lights come on to inform the driver of malfunctions in the systems (RAV4_ACA30 RM000000ONI01NX.html).

ABS, EBD and BA System
Malfunction Area
Fail-Safe Operation
ABS system
ABS, BA, TRC and VSC control prohibited
BA system
ABS, BA, TRC and VSC control prohibited
EBD system
ABS, EBD, BA, TRC and VSC control prohibited

TRC and VSC System:
Malfunction Area
Fail-Safe Operation
Engine control system
(TRC and VSC systems)
Before control: Disables control
During control: Uses only the brakes to perform control
Brake control system
(VSC system)
Before control: Disables control
During control: Uses only the engine to perform control
Brake control system
(TRC system)
Before control: Disables control
During control: Disables control (by gradually ending control)