Section 512 (Electronically Controlled Brake System - Diagnosis): Initialization

HINT:

• Perform initialization of linear solenoid valve and calibration when the skid control ECU, brake actuator or brake pedal stroke sensor is replaced.
• First perform the pedal stroke sensor zero point calibration and then initialization of linear solenoid valve and calibration when the brake stroke sensor is removed installed or the brake pedal height is adjusted (see BRAKE PEDAL HEIGHT, BRAKE PEDAL FREE PLAY, BRAKE PEDAL RESERVE DISTANCE & STOPLIGHT SWITCH ).
• First bleed air and then perform initialization of linear solenoid valve and calibration when the brake actuator is replaced.
• Initialization of linear solenoid valve and calibration cannot be performed again once it is stored unless the data is cleared or damaged. Perform initialization of linear solenoid valve and calibration after the stored value is initialized, except when replacing the skid control ECU.
• DTC C1259 59 is stored and ECB control is partly prohibited when the power switch is turned ON (READY) while the service plug grip of the HV battery is removed, preventing initialization of linear solenoid valve and calibration from being normally performed. In this case, connect the service plug grip with the power switch OFF and turn the power switch ON (READY) again to cancel the warning (ECB control prohibition).
• If there is a problem with auxiliary battery (12V) voltage, initialization of linear solenoid valve and calibration cannot be completed normally. Make sure to check 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 that case, wait until the temperature decreases and then perform initialization of linear solenoid valve and calibration.
• Do not depress the brake pedal during the initialization of linear solenoid valve and calibration procedure.

1. Clear stored value of "initialization of linear solenoid valve and calibration".
   1. Connect the hand-held tester to the DLC3 with the power switch off.
   2. Turn the power switch ON (READY) with the brake pedal released.
   3. Check that the "P" position switch indicator (P) is on.
   4. Turn the hand-held tester power switch on and clear the stored value of initialization of linear solenoid valve and calibration following the screen.
   Fig 1: Checking For Initialization Of Linear Solenoid Valve

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Perform "initialization of linear solenoid valve and calibration".
   1. Connect the hand-held tester to the DLC3 with the power switch off.
   2. Turn the power switch ON (READY) with the brake pedal released.
   3. Check that the main switch (parking switch) indicator (P) is on.
   4. Turn the power switch ON (READY) with the brake pedal depressed to display the "READY ON" indicator on the meter.
   5. Select the SIGNAL CHECK following the handheld tester screen.
   6. Leave the vehicle stationary without depressing the brake pedal for 1 to 2 minutes. Check that the interval between blinks of the Brake Control warning light (BRAKE warning (Yellow)) changes from 1 second to 0.25 second.
      NOTE:

      • Leave the meter's "READY" indicator on during the initialization of linear solenoid valve and calibration. Do not drive the vehicle or depress the brake pedal.
      • A DTC that indicates trouble with initialization of linear solenoid valve and calibration is stored if entering the TEST MODE with the shift lever in any position other than P.