Electronically Controlled Brake System: Initialization

HINT:

• If there is a problem with the auxiliary battery (12 V) voltage, initialization of linear solenoid valve and calibration cannot be completed normally. Make sure to check the auxiliary 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. In such a case, wait until the temperature decreases and then perform initialization of linear solenoid valve and calibration.
• If the power switch is turned off, the brake pedal is operated or vehicle speed is input while the linear solenoid valve offset learning is being performed, the learning will be cancelled.
  PARTS SPECIFICATION
  
  

  Replacement Parts	Necessary Operation
  Skid control ECU	Initialization of linear solenoid valve and calibration
  Brake actuator assembly	Bleed air Clearing stored value of linear solenoid valve and calibration data Initialization of linear solenoid valve and calibration
  Brake pedal stroke sensor Brake pedal	Inspection and adjustment of brake pedal height Clearing stored value of linear solenoid valve and calibration data Initialization of linear solenoid valve and calibration

1. Turn the power switch off.
2. Connect Techstream to the DLC3.
3. Move the shift lever to the P position.
4. Turn the power switch on (IG) with the brake pedal released.
5. Perform the Reset Memory function under the ABS/VSC/TRAC menu.
6. Perform initialization of linear solenoid valve.
7. Perform zero point calibration of yaw rate and acceleration sensor (See CALIBRATION ).

1. Turn the power switch off.
2. Connect Techstream to the DLC3.
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 auxiliary 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 (See DTC C1345/66 LINEAR SOLENOID VALVE OFFSET LEARNING UNDONE; DTC C1368/67 LINEAR SOLENOID VALVE OFFSET MALFUNCTION ).
5. Set Techstream to Test Mode (select "ECB* Utility").

   *: Electronically Controlled Brake

   HINT:

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

6. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.
7. Check that the interval between blinks of the brake control warning light changes from 1 second to 0.25 seconds.
   Fig 1: Blinking Pattern Of ABS Warning Light

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

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

   HINT:

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

Fig 2: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the power switch off.
2. Move the shift lever to the P position.
3. Turn the power switch on (IG) with the brake pedal released.
4. Using SST, connect and disconnect terminals TS and CG of the DLC3 4 times or more within 8 seconds.

   SST 09843-18040 

5. Check that no codes other than ABS code 42, VSC code 45 and Electronically Controlled Brake code 48, 66, or 95 are stored in the diagnostic system.
   Fig 3: Blinking Pattern Of ABS And Electronically Control Brake Code

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • The ABS warning, brake control warning lights and multi information display do not indicate the normal system code.
   • Illustrations may differ from the actual screen displayed depending on the specifications of the vehicle and customized settings.
6. Remove the SST from the terminals of the DLC3.
7. Using the check wire, perform initialization of linear solenoid valve and calibration.

1. Turn the power switch off.
2. Using SST, connect terminals TS and CG of the DLC3.

   SST 09843-18040 

   Fig 4: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 auxiliary 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 (See DTC C1345/66 LINEAR SOLENOID VALVE OFFSET LEARNING UNDONE; DTC C1368/67 LINEAR SOLENOID VALVE OFFSET MALFUNCTION ).
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: Blinking Pattern Of Brake Control Warning Light

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • The time needed to complete initialization of linear solenoid valve and calibration varies depending on the auxiliary battery voltage.
   • The brake control warning light blinks at 1 second intervals during 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. Check that DTC C1345/66 which indicates trouble with stroke sensor zero point learning is not output when the brake control warning light changes to the Test Mode display upon initialization of linear solenoid valve and calibration completion.
8. Turn the power switch off and disconnect the SST from the DLC3.