| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000025DVG |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): VSC does not Operate or VSC does not Operate Correctly; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
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VSC does not Operate or VSC does not Operate Correctly |
DESCRIPTION
When TRAC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred.
When a communication malfunction with the hybrid vehicle control ECU is detected, TRAC and VSC are disabled. Also, TRAC and VSC are disabled when a DTC is stored.
When in VSC off mode, or TRAC and VSC are disabled, the multi-information display in the combination meter assembly displays "Traction Control Turned Off" and the VSC OFF indicator light illuminates to inform the driver.
PROCEDURE
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1. |
BRAKE PROBLEM CHECK |
(a) Check whether the slip indicator light was illuminated when VSC did not operate.
OK:
The slip indicator light was illuminated.
HINT:
When a DTC is stored, the slip indicator light is illuminated and VSC does not operate due to the fail-safe function.
(b) Check whether the vehicle speed was 15 km/h (9 mph) or less when VSC did not operate.
OK:
The vehicle speed was 15 km/h (9 mph) or less.
HINT:
VSC does not operate when the vehicle speed is 15 km/h (9 mph) or less.
(c) Check whether the vehicle was driven straight for a few seconds at 15 km/h (9 mph) or more.
OK:
The vehicle was not driven straight for a few seconds at 15 km/h (9 mph) or more.
HINT:
When the ignition switch is turned to ON, as steering angle sensor zero point calibration is not performed below 15 km/h (9 mph), VSC will not operate until the vehicle is driven straight for a few seconds at 15 km/h (9 mph) or more.
| OK |
|
END |
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2. |
CHECK DTC |
(a) Check the DTCs (electronically controlled brake system) that are output.
Chassis > Brake Booster > Trouble Codes
Chassis > Brake/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
Electronically controlled brake system DTCs are output |
B |
| B |
|
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
|
3. |
CHECK TIRES |
(a) Check that the tire of each wheel is the correct size.
Click here
![2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION](/t3Portal/stylegraphics/info.gif)
OK:
The tire of each wheel is the correct size.
| NG |
|
REPLACE THE TIRE OF EACH WHEEL WITH THE CORRECT SIZE |
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4. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.
Click here
OK:
The yaw rate and acceleration sensor (airbag sensor assembly) is tightened to the specified torque.
The yaw rate and acceleration sensor (airbag sensor assembly) is not installed in a tilted position.
| OK |
|
| NG |
|
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY
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