FAIL-SAFE CHART
When the skid control ECU (brake actuator assembly) detects a solenoid valve malfunction or abnormal signal from a sensor, the brake actuator assembly cuts power and sends a signal indicating a malfunction of the electronically controlled brake system to the ECM.
Based on signals sent from the skid control ECU (brake actuator assembly), the brake actuator assembly prevents the solenoids from operating, and the ECM no longer accepts fuel-cut request signals from electronically controlled brake system.
If a malfunction of ABS, brake assist, TRC, AUTO LSD or VSC is detected, operation of the function is prohibited and the related warning lights illuminate.
The EBD function can still operate even if operation of the ABS function is prohibited. However, if the EBD function is also affected, operation of the EBD system will be prohibited and the brake warning light illuminates.
When a component of the electronically controlled brake system is in fail-safe mode, operation is prohibited. However, if the system enters fail-safe mode while braking is being controlled, control is gradually suspended to prevent sudden changes in vehicle behavior.
If the skid control ECU (brake actuator assembly) detects a malfunction in the SRS system, secondary collision brake control is prohibited to prevent undesired operation and to protect the system.
for Multi-information Display Type:
When control is prohibited, a message is displayed on the multi-information display in the combination meter assembly.
| Item | Operation |
|---|---|
| Malfunction in the ABS. | ABS, BA, TRC, AUTO LSD and VSC control prohibited. |
| Malfunction in the BA system. | ABS, BA, TRC, AUTO LSD and VSC control prohibited. |
| Malfunction in the EBD system. | ABS, EBD, BA, TRC, AUTO LSD and VSC control prohibited. |
| Item | Operation |
|---|---|
| Malfunction in the engine control system (TRC systems). | Before control: Disables control.
During control: Uses only the brakes to perform control (Operation continues during TRC operation). |
| Malfunction in the engine control system (VSC systems). | Before control: Disables control.
During control: Uses only the brakes to perform control (Cut off immediately). |
| Malfunction in the brake control system (VSC system). | Before control: Disables control.
During control: Uses only the engine to perform control (Cut off immediately). |
| Malfunction in the brake control system (TRC and AUTO LSD system). | Before control: Disables control.
During control: Disables control (Cut off immediately). |
| Item | Operation |
|---|---|
| Malfunction in the airbag system (secondary collision brake system). | Before control: Disables control.
During control: Uses only the brakes to perform control. |
| Malfunction in the engine control system (secondary collision brake system). | Before control: Disables control.
During control: Uses only the brakes to perform control (Cut off immediately). |