Toyota Corolla Cross: 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 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 | .gif)
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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 |
|---|---|
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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.
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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 ECU ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.
Click here
OK:
The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.
The yaw rate and acceleration sensor (airbag ECU assembly) is not installed in a tilted position.
| OK |
|
OBTAIN YAW RATE AND ACCELERATION SENSOR ZERO POINT |
| NG |
|
INSTALL AIRBAG ECU ASSEMBLY CORRECTLY |
READ NEXT:
VSC OFF Switch Circuit
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected
to the combination meter assembly via CAN communication.
Pressing the VSC OFF switch turns off TRAC operation, and pressing
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
FRONT WHEEL
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-
SEE MORE:
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB) CHECK VEHICLE CONTROL HISTORY (HYBRID CONTROL SYSTEM)
(a) Check the vehicle control history (RoB). Powertrain > Hybrid Control > Utility
Tester Display
Vehicle Control History (RoB)
Code Tester Display
Measurement Item Dia
Front Side Marker Light Circuit
DESCRIPTION When the light control switch is in the TAIL or HEAD position, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly LH/RH to illuminate the front side marker lights. WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspe
