RM38T0EC _54 Brake _112606 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0608077 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) J

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model)  VSC does not Operate or VSC does not Operate Correctly  


DESCRIPTION

When TRC 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, TRC and VSC are disabled. Also, TRC and VSC are disabled when a DTC is stored.

When in VSC off mode, or TRC 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.



Result:
Proceed to
OK
NG



OK

END

NG

2.CHECK DTC
2.CHECK DTC
a.

Check the DTCs (electronically controlled brake system) that are output.

Chassis > Brake Booster > Trouble Codes
50001 466
Chassis > Brake/EPB > Trouble Codes
50001 435

Result:
Result Proceed to
DTCs are not output A
Electronically controlled brake system DTCs are output B



A

3.CHECK TIRES

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

3.CHECK TIRES
a.

Check that the tire of each wheel is the correct size.

Click hereSuspension>TIRE / WHEEL>TIRE AND WHEEL SYSTEM>INSPECTION

OK:

The tire of each wheel is the correct size.



Result:
Proceed to
OK
NG



OK

4.CHECK AIRBAG ECU ASSEMBLY INSTALLATION

NG

REPLACE THE TIRE OF EACH WHEEL WITH THE CORRECT SIZE

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 hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>INSTALLATION

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.



Result:
Proceed to
OK
NG



OK

OBTAIN YAW RATE AND ACCELERATION SENSOR ZERO POINT

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HEV Model)>UTILITY


NG

INSTALL AIRBAG ECU ASSEMBLY CORRECTLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>INSTALLATION