Vehicle Stability Control System: Calibration

1. After replacing the VSC relevant components or performing "Front wheel alignment adjustment", clearing and reading the sensor calibration data are necessary.
2. Follow the chart to perform calibration.
   CALIBRATION REFERENCE CHART
   
   

   Replacing Parts	Necessary Operation
   Skid Control ECU	Yaw rate sensor and acceleration sensor zero point calibration.
   yaw rate and acceleration sensor	Clearing zero point calibration data. Yaw rate sensor and acceleration sensor zero point calibration.
   Front Wheel Alignment	Clearing zero point calibration data. Yaw rate sensor and acceleration sensor zero point calibration.

HINT:

After replacing the yaw rate and acceleration sensor, make sure to clear zero point calibration data in the skid control ECU and perform zero point calibration.

1. Clear the zero point calibration using the SST check wire.

   SST 09843-18040 

   1. Turn the ignition switch to the ON position.
   2. Using SST, connect and disconnect terminals TS and CG of the DLC3 4 times or more within 8 seconds.
      Fig 1: Identifying Terminals TS And CG Of DLC3 Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check that the warning light indicates the normal system code.
   4. Remove the SST.

HINT:

After replacing the ABS and TRACTION actuator assembly, make sure to perform yaw rate and acceleration sensor zero point calibration.

Fig 2: Normal System Code Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Shift the shift lever to the P position.
2. Clear the zero point calibration.
3. Procedures for test mode:
   1. Turn the ignition switch off
   2. Apply the parking brake (Parking brake switch ON).
   3. Using SST, connect terminals TS and CG of the DLC3.

      SST 09843-18040 

      Fig 3: Identifying Terminals TS And CG Of DLC3 Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
   5. Turn the ignition switch to the ON position.
4. Keep the vehicle in the stationary condition on a level surface for 2 seconds or more.
5. Check that the VSC warning light blinks.

   HINT:

   • If the VSC warning light does not blink, perform the zero point calibration again.
   • The zero point calibration is performed only once after the system enters the test mode.
   • Calibration cannot be performed again until the stored data is cleared once.

HINT:

After replacing the yaw rate and acceleration sensor, make sure to clear zero point calibration data in the skid control ECU and perform zero point calibration.

1. Clearing the DTCs.
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Operate Techstream to erase the codes.

      HINT:

      Refer to the Techstream operator's manual for further details.

1. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
2. Connect Techstream to the DLC3.
3. Turn the ignition switch to the ON position.
4. Operate Techstream to test mode (Test Mode).
5. Obtain the zero point of the yaw rate and acceleration sensor:
   1. Keep the vehicle in the stationary condition on a level surface for 2 seconds or more.
   2. Check that the VSC warning light blinks.

      HINT:

      • If the VSC warning light does not blink, perform the zero point calibration again.
      • The zero point calibration is performed only once after the system enters the test mode.
      • Calibration cannot be performed again until the stored data is cleared once.
6. Turn the ignition switch off.