Abs With EBD & BA & TRAC & VSC System - Diagnostics: Calibration

DESCRIPTION
After replacing the VSC relevant components or performing "Front wheel alignment adjustment", clearing and reading the sensor calibration data are necessary.

Follow Fig 1 to perform calibration.

HINT:

For a rear air suspension vehicle, it is necessary to obtain zero point calibration data (again) after adjusting vehicle height.

Fig 1: Zero Point Calibration Data Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

USING SST CHECK WIRE:
CLEAR ZERO POINT CALIBRATION
HINT:

After replacing the yaw rate and deceleration sensor, make sure to clear zero point calibration data in the master cylinder solenoid (skid control ECU) and perform zero point calibration.
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 2: Locating Terminals TS & CG Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the warning light indicates the normal system code.
4. Remove the SST from the terminals of the DLC3.
5. Using a check wire, perform the zero point calibration of the yaw rate and deceleration sensor (refer to step 3).
  
  Fig 3: Normal System Code Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND DECELERATION SENSOR
After replacing the master cylinder solenoid and/or yaw rate and deceleration sensor, make sure to perform yaw rate and deceleration sensor zero point calibration.
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. Procedures for 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 and move the shift lever to the P position.
    NOTE: DTC C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position (see DTC C1210/36, C1336/39: ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; ZERO POINT CALIBRATION OF DECELERATION SENSOR UNDONE ).
  4. Turn the ignition switch to the ON position.
  5. Keep the vehicle in a stationary condition on a level surface for 2 seconds or more.
    
    Fig 4: Identifying Terminals TS & CG Of DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Check that the VSC TRAC warning light is blinking in test mode.
NOTE: The VSC TRAC warning light stays on when obtaining the zero point.

HINT:
- If the VSC TRAC 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.
  
  Fig 5: VSC TRAC Warning Light Blinking Pattern In Test Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
USING HAND-HELD TESTER:
CLEAR ZERO POINT CALIBRATION
After replacing the yaw rate and deceleration sensor, make sure to clear zero point calibration data in the master cylinder solenoid (skid control ECU) and perform zero point calibration.
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Operate the hand-held tester to erase the codes.
  HINT:
  
  Refer to the hand-held tester operator's manual for further details.
4. Using the hand-held tester, perform the zero point calibration of the yaw rate and deceleration sensor (refer to step 5).
  
  Fig 6: Connecting Hand-Held Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND DECELERATION SENSOR
After replacing the master cylinder solenoid and/or yaw rate and deceleration sensor, make sure to perform yaw rate and deceleration sensor zero point calibration.
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. Procedures for test mode.
  1. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
    NOTE: DTC C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position (see DTC C1210/36, C1336/39: ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE, ZERO POINT CALIBRATION OF DECELERATION SENSOR UNDONE ).
  2. Connect the hand-held tester to the DLC3.
    
    Fig 7: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Turn the ignition switch to the ON position.
  4. Set the hand- held tester to test mode (TEST MODE).
    HINT:
    
    Refer to the hand-held tester operator's manual for further details.
  5. Keep the vehicle in a stationary condition on a level surface for 2 seconds or more.
    
    Fig 8: Identifying Display (Test Mode) Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Check that the VSC TRAC warning light is blinking in test mode.
NOTE: The VSC TRAC warning light stays on when obtaining the zero point.

HINT:
- If the VSC TRAC 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.
  
  Fig 9: Identifying VSC TRAC Warning Light Blinking Pattern In Test Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002