Vehicle Stability Control System: Calibration

DESCRIPTION

After replacing the relevant VSC components, clear the sensor calibration data and perform calibration.

Fig 1: Checking Connector And Wire Harness

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

REPLACEMENT/ADJUSTMENT PART AND NECESSARY OPERATION CHART

Replacement/Adjustment Part	Necessary Operation
Master cylinder solenoid (Skid control ECU)	Yaw rate and G sensor zero point calibration
Yaw rate and G sensor	Clearing zero point calibration data Yaw rate and G sensor zero point calibration
Vehicle height adjustment	Clearing zero point calibration data Yaw rate and G sensor zero point calibration Steering angle sensor initialization

CLEAR ZERO POINT CALIBRATION (SST CHECK WIRE)
After replacing the yaw rate and G sensor or performing a vehicle height adjustment, make sure to clear the zero point calibration data in the skid control ECU and perform zero point calibration.
1. Turn the engine switch on (IG).
2. Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
  SST 09843-18040
  
  Fig 2: Identifying DLC3 Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that "DIAG VSC OK" is displayed on the multi-information display and check that the ABS warning light outputs the normal system code.
4. Using a check wire, perform zero point calibration of the yaw rate and G sensor.
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND G SENSOR (SST CHECK WIRE)
After replacing the master cylinder solenoid and/or yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration.

Fig 3: Identifying ABS Warning Light Blinking Pattern (Normal System Code)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it. Keep it stationary and do not start the engine.
- Choose a level surface with an inclination of less than 1°.
1. Procedures for Test Mode:
  1. Turn the engine switch off.
  2. Move the shift lever to P.
    NOTE: DTC C1210/36 and C1336/98 will be stored if the shift lever is not in P (See DTC C1210/36 ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; DTC C1336/98 ZERO POINT CALIBRATION OF ACCELERATION SENSOR UNDONE ).
  3. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
    SST 09843-18040
  4. Check that the steering wheel is centered.
  5. Turn the engine switch on (IG).
  6. Keep the vehicle stationary on a level surface for 2 seconds or more.
    
    Fig 4: Identifying DLC3 Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Check that "VSC TEST MODE" is displayed on the multi-information display and check that the ABS warning light is blinking in test mode.
  NOTE: The ABS warning light stays on when obtaining the zero point.
  
  Fig 5: Identifying ABS Warning Light Blinking Pattern (Test Mode)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  - If the ABS warning light does not blink, perform the zero point calibration again.
  - The zero point calibration is performed only once after the system enters test mode.
  - Calibration cannot be performed again until the stored data is cleared once.
CLEAR ZERO POINT CALIBRATION (TECHSTREAM)
After replacing the yaw rate and G sensor or performing a vehicle height adjustment, make sure to clear the zero point calibration data in the skid control ECU and perform zero point calibration.
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / ABS/VSC/ TRAC / Utility / Reset Memory.
5. Using the Techstream, perform zero point calibration of the yaw rate and G sensor.
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND G SENSOR (TECHSTREAM)
After replacing the master cylinder solenoid and/or yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration.
NOTE:
- While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it. Keep it stationary and do not start the engine.
- Choose a level surface with an inclination of less than 1°.
1. Procedures for Test Mode:
  1. Turn the engine switch off.
  2. Move the shift lever to P.
    NOTE: DTC C1210/36 and C1336/98 will be stored if the shift lever is not in P (See DTC C1210/36 ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; DTC C1336/98 ZERO POINT CALIBRATION OF ACCELERATION SENSOR UNDONE ).
  3. Check that the steering wheel is centered.
  4. Connect the Techstream to the DLC3.
  5. Turn the engine switch on (IG).
  6. Turn the Techstream on.
  7. Enter the following menus: Chassis / ABS/VSC/ TRAC / Utility / Test Mode.
  8. Keep the vehicle stationary on a level surface for 2 seconds or more.
  9. Check that "VSC TEST MODE" is displayed on the multi-information display and check that the ABS warning light is blinking in test mode.
  NOTE: The ABS warning light stays on when obtaining the zero point.
  
  Fig 6: Identifying ABS Warning Light Blinking Pattern (Test Mode)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  - If the ABS warning light does not blink, perform the zero point calibration again.
  - The zero point calibration is performed only once after the system enters test mode.
  - Calibration cannot be performed again until the stored data is cleared once.