VEHICLE STABILITY CONTROL SYSTEM CALIBRATION

DESCRIPTION

After replacing any VSC related components or performing wheel alignment adjustment, clear and read the sensor calibration data.

Refer to the table below and then perform the necessary operation according to the part to be replaced in order to perform calibration.

Parts to be Replaced / Operation	Necessary Operation
Skid control ECU (brake actuator assembly)	Yaw rate and acceleration sensor zero point calibration.
Yaw rate and acceleration sensor (airbag sensor assembly)	Clearing zero point calibration data. Yaw rate and acceleration sensor zero point calibration.
Wheel alignment adjustment	Clearing zero point calibration data. Yaw rate and acceleration sensor zero point calibration.

OBTAIN ZERO POINT OF YAW RATE AND ACCELERATION SENSOR (When Using GTS)
Note
- Stored system information cannot be overwritten unless it is cleared. Clear the stored information and then store new system information.
- While obtaining the zero points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
- Be sure to perform this procedure on a level surface (with an inclination of less than 1 degree).
1. Clear the zero point calibration data.
  1. Turn the ignition switch off.
  2. Check that the steering wheel is in the straight-ahead position.
  3. for Manual Transaxle:
    
    Check that the shift lever is in neutral and apply the parking brake.
    
    except Manual Transaxle:
    
    Check that the shift lever is in P and apply the parking brake.
  4. Connect the GTS to the DLC3.
  5. Turn the ignition switch to ON.
  6. Turn the GTS on.
  7. Select the skid control ECU (brake actuator assembly) to clear the zero point calibration data using the GTS.
    
    Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Reset Memory.
    
    Chassis > ABS/VSC/TRC > Utility
    
    Tester Display
    
    Reset Memory
  8. Check that the slip indicator light comes on.
  9. Turn the ignition switch off.
    
    Note
    
    If the ignition switch is turned to ON for more than 15 seconds with the shift lever in P (except Manual Transaxle) or the parking brake applied (for Manual Transaxle) after the 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 (brake actuator assembly) will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU (brake actuator assembly) will then also indicate this as a malfunction of the VSC system using the indicator light.
2. Perform zero point calibration of the yaw rate and acceleration sensor.
  1. Turn the ignition switch off.
  2. Check that the steering wheel is in the straight-ahead position.
  3. for Manual Transaxle:
    
    Check that the shift lever is in neutral and apply the parking brake.
    
    except Manual Transaxle:
    
    Check that the shift lever is in P and apply the parking brake.
    Note
    - When Test Mode is selected with the parking brake is not applied*1 or shift lever not in P*2, the yaw rate and acceleration sensor zero point calibration incomplete DTC is stored.
    - When the vehicle is driven with the zero point cleared, the yaw rate and acceleration sensor zero point calibration incomplete DTC is stored.
    - If a DTC is stored that indicates zero point calibration is incomplete, repeat the procedure starting at the step for clearing the zero point calibration data and system information.
  4. Connect the GTS to the DLC3.
  5. Turn the ignition switch to ON.
  6. Turn the GTS on.
  7. Switch the skid control ECU (brake actuator assembly) to Test Mode using the GTS.
    
    Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Test Mode.
    
    Chassis > ABS/VSC/TRC > Utility
    
    Tester Display
    
    Test Mode
  8. After the Test Mode has been entered, keep the vehicle stationary on a level surface for 5 seconds or more.
  9. Check that the slip indicator light comes on for several seconds and then blinks in the Test Mode pattern.
    Tech Tips
    - If the slip 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.
  10. Turn the ignition switch off and disconnect the GTS.
OBTAIN ZERO POINT OF YAW RATE AND ACCELERATION SENSOR (When Using SST Check Wire)
Note
- Stored system information cannot be overwritten unless it is cleared. Clear the stored information and then store new system information.
- While obtaining the zero points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
- Be sure to perform this procedure on a level surface (with an inclination of less than 1 degree).
1. Clear the zero point calibration data.
  1. Turn the ignition switch off.
  2. Check that the steering wheel is in the straight-ahead position.
  3. for Manual Transaxle:
    
    Check that the shift lever is in neutral and apply the parking brake.
    
    except Manual Transaxle:
    
    Check that the shift lever is in P and apply the parking brake.
  4. Turn the ignition switch to ON.
  5. The warning light and indicator light come on for 3 seconds to indicate that the initial check is completed.
  6. *a Front view of DLC3
    
    Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
    
    SST
    
    09843-18040
  7. Check that the slip indicator light comes on.
    
    Note
    
    If the ignition switch is turned to ON for more than 15 seconds with the shift lever in P (except Manual Transaxle) or the parking brake applied (for Manual Transaxle) after the 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 (brake actuator assembly) will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU (brake actuator assembly) will then also indicate this as a malfunction of the VSC system using the indicator light.
  8. Turn the ignition switch off.
2. Perform zero point calibration of the yaw rate and acceleration sensor.
  1. Turn the ignition switch off.
  2. Check that the steering wheel is in the straight-ahead position.
  3. for Manual Transaxle:
    
    Check that the shift lever is in neutral and apply the parking brake.
    
    except Manual Transaxle:
    
    Check that the shift lever is in P and apply the parking brake.
    Note
    - When Test Mode is selected with the parking brake is not applied*1 or shift lever not in P*2, the yaw rate and acceleration sensor zero point calibration incomplete DTC is stored.
    - When the vehicle is driven with the zero point cleared, the yaw rate and acceleration sensor zero point calibration incomplete DTC is stored.
  4. *a Front view of DLC3
    
    Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
  5. Turn the ignition switch to ON.
  6. After Test Mode has been entered, keep the vehicle stationary on a level surface for 5 seconds or more.
  7. Check that the slip indicator light comes on for several seconds and then blinks in the Test Mode pattern.
    Tech Tips
    - If the slip 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.
  8. Turn the ignition switch off and disconnect SST from the DLC3.