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Electronically Controlled Brake System: Initialization: Initialization

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.
  1. DESCRIPTION 
    1. Perform initialization of linear solenoid valve and calibration when the skid control ECU, brake actuator or brake pedal stroke sensor is replaced.

      Follow the procedure to perform initialization.

      HINT: 

      • If there is a problem with battery (12 V) voltage, initialization of linear solenoid valve and calibration cannot be completed normally. Check the battery voltage before performing initialization of linear solenoid valve and calibration.
      • If the actuator's temperature is high, initialization of linear solenoid valve and calibration may not be completed normally. If so, wait until the temperature drops and then perform initialization of linear solenoid valve and calibration.
      • If the power switch is turned OFF, brake pedal is operated or vehicle speed is input while the linear solenoid valve offset learning is being performed, the learning will be canceled.
      Replacement Parts Necessary Operation
      Skid control ECU Initialization of linear solenoid valve and calibration
      Brake actuator
      1. Bleed air
      2. Clearing stored value of linear solenoid valve and calibration data
      3. Initialization of linear solenoid valve and calibration
      • Brake pedal stroke sensor
      • Brake pedal
      1. Inspection and adjustment of brake pedal height
      2. Clearing stored value of linear solenoid valve and calibration data
      3. Initialization of linear solenoid valve and calibration
  2. CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Move the shift lever to the P position.
    3. Turn the power switch ON (IG) with the brake pedal released.
    4. Perform the Reset Memory function under the ABS/VSC/TRAC menu.
    5. Perform initialization of linear solenoid valve.
    6. Perform zero point calibration of yaw rate and acceleration sensor. Refer toCALIBRATION .
  3. PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Move the shift lever to the P position.
    3. Turn the power switch ON (IG) with the brake pedal released.
      NOTE:
      • If the linear solenoid valve offset learning is performed without turning the power switch ON (IG), the learning process may not be completed properly because of insufficient battery voltage.
      • When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored.
    4. Set the Techstream to Test Mode (select "ECB* Utility").

      *: Electronically Controlled Brake

      HINT: 

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

    5. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.
    6. Check that the interval between blinks of the brake control warning light changes from 1 second to 0.25 seconds.
      Fig 1: Brake Control Warning Light Blinking Pattern
      GTY103578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      • The time needed to complete initialization of linear solenoid valve and calibration varies depending on battery voltage.
      • The brake control warning light blinks at 1 second intervals during the initialization of linear solenoid valve and calibration. The brake control warning light blinks at 0.25 seconds intervals if the Test Mode is normal.
    7. When the brake control warning light changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning is not output.
    8. Enter the normal mode from the Test Mode following the Techstream prompts.

      HINT: 

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

  4. CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE) 
    1. Move the shift lever to the P position.
      Fig 2: Identifying DLC3 (CG & TS) Connector Terminals
      GTY155781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the power switch ON (IG) with the brake pedal released.
    3. Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
      • SST: 09843-18040 
    4. Check that no codes other than ABS code 42, VSC code 45 and electronically controlled brake system code 48, 66, or 95 are stored in the diagnostic system.
      Fig 3: Identifying ABS Trouble Code Blinking Pattern
      GTY101759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      The ABS warning, brake control warning and slip indicator lights do not indicate the normal system code.

    5. Remove SST from the terminals of the DLC3.
    6. Using the check wire, perform initialization of linear solenoid valve and calibration.
  5. PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE) 
    1. Turn the power switch OFF.
    2. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
      Fig 4: Identifying DLC3 (CG & TS) Connector Terminals
      GTY155781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09843-18040 
    3. Move the shift lever to the P position.
    4. Turn the power switch ON (IG) with the brake pedal released.
      NOTE:
      • If the linear solenoid valve offset learning is performed without turning the power switch ON (IG), the learning process may not be completed properly because of insufficient battery voltage.
      • When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored.
    5. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.
    6. Check that the interval between blinks of the brake control warning light changes from 1 second to 0.25 seconds.
      Fig 5: Brake Control Warning Light Blinking Pattern
      GTY103578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      • The time needed to complete initialization of linear solenoid valve and calibration varies depending on the battery voltage.
      • The brake control warning light blinks at 1 second intervals during the initialization of linear solenoid valve and calibration and changes to the Test Mode display.
      • The brake control warning light blinks at 0.25 seconds intervals if the Test Mode is normal.
    7. When the brake control warning light changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning is not output.
    8. Turn the power switch OFF and disconnect SST from the DLC3.
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