| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HBK8 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): VSC does not Operate or VSC does not Operate Correctly; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 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 ECM 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.
CAUTION / NOTICE / HINT
NOTICE:
After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and store system information memorization after performing "Reset Memory".
Click here
![2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): UTILITY](/t3Portal/stylegraphics/info.gif)
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 |
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END |
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2. |
CHECK DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Chassis / Brake / Trouble Codes.
(d) Check the DTCs (electronically controlled brake system) that are output.
Chassis > Brake > Trouble Codes
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Result |
Proceed to |
|---|---|
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DTCs are not output |
A |
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Electronically controlled brake system DTCs are output |
B |
| B |
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REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
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3. |
CHECK TIRES |
(a) Check that the tire of each wheel is the correct size.
Click here
OK:
The tire of each wheel is the correct size.
| NG |
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REPLACE THE TIRE OF EACH WHEEL WITH THE CORRECT SIZE |
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4. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) 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 |
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PERFORM OBTAIN ACCELERATION SENSOR ZERO POINT
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| NG |
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INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY
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