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 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.
PROCEDURE
|
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/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 .gif)
OK:
The tire of each wheel is the correct size.
| NG |
|
REPLACE THE TIRE OF EACH WHEEL WITH THE CORRECT SIZE |
|
|
4. |
CHECK AIRBAG ECU ASSEMBLY INSTALLATION |
(a) 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 |
|
PERFORM OBTAIN ACCELERATION SENSOR ZERO POINT |
| NG |
|
INSTALL AIRBAG ECU ASSEMBLY CORRECTLY |
READ NEXT:
Brake Actuator Operation Sound is Loud during Initial Check
PROCEDURE
1.
PERFORM ROAD TEST
(a) After turning the ignition switch to ON, compare the operating
sound of the brake actuator the first time the vehicle speed reach
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 (combination switch assembly) turns
o
SEE MORE:
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REOVAL)
Procedure
Part Name Code
1
TAIL EXHAUST PIPE ASSEMBLY
17430
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-
2
MAIN MUFFLER HEAT INSULATOR
Starter Inrush Current Reduction Relay Circuit
DESCRIPTION The starter inrush current reduction relay prevents the auxiliary battery voltage from becoming dropping excessively while the starter assembly is operating. If the auxiliary battery voltage drops below the threshold, stop and start control will be prohibited. In order to prevent this, t
