Toyota Yaris: Vehicle Stability Control System / Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE OPERATION
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If there is a problem with sensor signals or actuator systems, the skid control ECU prohibits power supply to the brake actuator assembly and informs the ECM of an VSC system malfunction.
The brake actuator assembly 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, TRC 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 system warning light will come on to warn the driver.
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If an 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 control so as not to trigger a sudden change in vehicle operation.
If it is impossible for control to continue, the warning light comes on to inform the driver of system control termination.
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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.
HINT:
When control is prohibited, a message is displayed on the multi-information display in the combination meter assembly.
| Malfunction Area | Control Method |
|---|---|
| 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. |
| Malfunction Area | Control Method |
|---|---|
| Engine control system (TRC system) | 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). |
| Malfunction Area | Control Method |
|---|---|
| Airbag system (Secondary collision brake system) | Before control: Disables control. During control: Uses only the brakes to perform control. |
| Engine control system (Secondary collision brake system) | Before control: Disables control. During control: Uses only the brakes to perform control. |
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Using the GTS, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output. CHECK FREEZE FRAME DATA WHEN DTC WAS STORED HINT:
Freeze frame data is stored when a DTC is output...
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST (BRAKE) NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not...
Other information:
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Dtc Check / Clear
DTC CHECK / CLEAR DTC CHECK (a) Operate the GTS to read the DTCs. Chassis > Brake > Trouble Codes (b) Check the details of the DTCs. NOTICE: Make sure to clear the DTCs after repair. Freeze frame data is stored for each of the latest result DTCs and confirmed DTCs...
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Components
COMPONENTS ILLUSTRATION *1 FUEL RETURN VENT TUBE SUB-ASSEMBLY *2 FUEL SENDER GAUGE ASSEMBLY *3 REAR FLOOR SERVICE HOLE COVER *4 NO. 1 FUEL TUBE CLAMP *5 FUEL PUMP GAUGE RETAINER *6 FUEL TANK VENT TUBE ASSEMBLY *7 NO...
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Supplemental Restraint System (SRS) Precautions
The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.
The air bags are installed in the following locations:
The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)