Vehicle Stability Control System: Calibration

After replacing the VSC relevant components or performing "Front wheel alignment adjustment", clear and read the sensor calibration data.

Follow the chart to perform calibration.

PARTS OPERATION CHART

Replacing Parts / Operation	Necessary Operation
Skid control ECU	Yaw rate and acceleration sensor zero point calibration
Yaw rate and acceleration sensor	Clearing zero point calibration data Yaw rate and acceleration sensor zero point calibration
Front wheel alignment adjustment	Clearing zero point calibration data Yaw rate and acceleration sensor zero point calibration

CLEAR ZERO POINT CALIBRATION DATA (for Using an Intelligent Tester)
1. Turn the ignition switch off.
2. Connect the intelligent tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Turn the intelligent tester on.
  
  Fig 1: Connecting Intelligent Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Switch to skid control ECU to erase the codes using the intelligent tester. Enter the following menus: DIAGNOSIS / OBD/MOBD / ABS/VSC / RESET MEMORY.
6. Turn the ignition switch off.
  NOTE: If the ignition switch is turned to the ON position for more than 15 seconds with the shift lever in the P position after zero point of the yaw rate and acceleration sensor has been cleared, only the zero point of the yaw rate sensor will be stored. If the vehicle is driven under these conditions, the skid control ECU will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU will then also indicate this as a malfunction of the VSC system using the warning lights.
  
  Fig 2: Consult-II Display - Reset Memory
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Using the intelligent tester, perform zero point calibration of the yaw rate and acceleration sensor.
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR (for Using an Intelligent Tester)
NOTE:
- While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it and keep it in a stationary condition. (Do not start the engine.)
- Be sure to do this on a level surface (with an inclination of less than 1 degree).
1. Procedure to enter test mode
  1. Turn the ignition switch off.
  2. Check that the steering wheel is in the straight-ahead position.
  3. Check that the shift lever is in the P position.
    NOTE: DTCs C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position (See DTC C1210/36 ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; DTC C1336/39 ZERO POINT CALIBRATION OF ACCELERATION SENSOR UNDONE ).
  4. Connect the intelligent tester to the DLC3.
  5. Turn the ignition switch to the ON position.
  6. Turn the intelligent tester on.
    
    Fig 3: Connecting Intelligent Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Switch to skid control ECU to test mode using the intelligent tester. Enter the following menus: DIAGNOSIS / OBD/MOBD / ABS/VSC / TEST MODE.
2. 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.
    
    Fig 4: Consult-II Display - Test Mode
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check that the VSC OFF indicator light blinks (test mode).
    HINT:
    - If the VSC OFF indicator light does not blink, perform 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.
3. Turn the ignition switch off and disconnect the intelligent tester.
CLEAR ZERO POINT CALIBRATION DATA (for Using a SST Check Wire)
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.
  SST 09843-18040
  
  Fig 6: Identifying DLC3 Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the VSC OFF indicator light comes on.
  NOTE: If the ignition switch is turned to the ON position for more than 15 seconds with the shift lever in the P position after zero point of the yaw rate and acceleration sensor has been cleared, only the zero point of the yaw rate sensor will be stored. If the vehicle is driven under these conditions, the skid control ECU will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU will then also indicate this as a malfunction of the VSC system using the warning lights.
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR (for Using a SST Check Wire)
NOTE:
- While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it and keep it in a stationary condition. (Do not start the engine.)
- Be sure to do this on a level surface (with an inclination of less than 1 degree).
1. Procedure to enter test mode
  1. Turn the ignition switch off.
  2. Using SST, connect terminals TS and CG of the DLC3.
    SST 09843-18040
  3. Check that the steering wheel is in the straight-ahead position.
  4. Check that the shift lever is in the P position.
    NOTE: DTCs C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position (See DTC C1210/36 ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; DTC C1336/39 ZERO POINT CALIBRATION OF ACCELERATION SENSOR UNDONE ).
    
    Fig 7: Identifying DLC3 Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Obtain the zero point of the yaw rate and acceleration sensor.
  1. Turn the ignition switch to the ON position.
  2. Keep the vehicle in a stationary condition on a level surface for 2 seconds or more.
  3. Check that the VSC OFF indicator light blinks (test mode).
    HINT:
    - If the VSC OFF indicator light does not blink, perform 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.
3. Turn the ignition switch off and disconnect SST from the DLC3.