Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM10000000214RP
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): VSC does not Operate or VSC does not Operate Correctly; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]

VSC does not Operate or VSC does not Operate Correctly

DESCRIPTION

When ABS, TRAC, VSC or trailer sway control is operating, the No. 2 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.

CAUTION / NOTICE / HINT

NOTICE:

After replacing or reinstalling the yaw rate and acceleration sensor (airbag ECU assembly), perform "Calibration" after performing "Reset Memory".

Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

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 35 km/h (22 mph) or more.

OK:

The vehicle was not driven straight for a few seconds at 35 km/h (22 mph) or more.

HINT:

When the ignition switch is turned to ON, as steering sensor zero point calibration is not performed below 35 km/h (22 mph), VSC will not operate until the vehicle is driven straight for a few seconds at 35 km/h (22 mph) or more.

OK

END

NG

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

A

3.

CHECK TIRES

(a) Check that the tire of each wheel is the correct size.

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION

OK:

The tire of each wheel is the correct size.

NG

REPLACE THE TIRE OF EACH WHEEL WITH THE CORRECT SIZE

OK

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 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; 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 tilted.

OK

OBTAIN YAW RATE AND ACCELERATION SENSOR ZERO POINT

NG

INSTALL AIRBAG ECU ASSEMBLY