Bleeding Sequence

CAUTION: Bleeding without the Toyota hand-held tester may result in the air not being completely bled. As this can result in an accident, be sure to use the hand-held tester for air bleeding.

NOTE: Move the shift lever to the "P" position and apply the parking brake before bleeding air.

NOTE: Add brake fluid carefully so that it remains between MIN and MAX lines of the reservoir while bleeding air.

NOTE: Actuator pump motor and master pressure cut-off solenoid can operate through a supplemental power source even if the power switch is off.

NOTE: A buzzer may sound due to the accumulator pressure decline during air bleeding, however, keep on bleeding brake system.

Using the Toyota hand-held tester, proceed as follows:

Connect the hand-held tester to the DLC3 with the power switch off. See Fig 1. Turn the power switch on (IG) and turn on the hand-held tester. Do not start the engine.
Select DIAGNOSTIC MENU ABS/VSC AIR BLEEDING on the hand-held tester. Select AIR BLEEDING. Select Usual if the front and/or rear brakes were removed, installed or disassembled. Perform step 4, if Usual is selected.
NOTE: Return to MENU and bleed the air again if FAILED is shown on the display during air bleeding.

NOTE: Remove and install the relays if instructed to remove and install motor relays No. 1 and 2 by the hand-held tester. See Fig 2.
Add brake fluid into the reservoir with SAE J1703 or FMVSS No. 116 DOT3. If the master cylinder has been disassembled or if the reservoir becomes empty, bleed the air out of the master cylinder. Disconnect the brake lines from the master cylinder. Slowly depress and hold the brake pedal. Cover the outer holes with your fingers, and release the brake pedal. Repeat process 3 or 4 times. Connect the brake lines to the master cylinder and torque brake line nuts to specification. See TORQUE SPECIFICATIONS .
Bleed Front & Rear Brake Systems - :
- Remove motor relays No. 1 and 2. See Fig 2. Bleed the air out of the FR/FL wheels. Depress the brake pedal several times, then loosen the bleeder plug with the pedal depressed. When the fluid stops coming out, tighten the bleeder plug to specification. See TORQUE SPECIFICATIONS . Then release the brake pedal. Repeat procedure until all the air in the fluid is completely bled out of the FR/FL wheels. Go to next step.
- Install the motor relays No. 1 and 2. Depress the brake pedal and loosen the bleeder plug of RL wheel until all the air in the fluid is completely bled out. Do not pump the brake pedal. Hold the brake pedal depressed when bleeding the air out of the rear brake systems. The actuator motor relay starts operation and oil pressure is applied to the rear brake systems if the brake pedal is depressed, which allows air bleeding through the bleeder plug. Tighten the bleeder plug to specification. See TORQUE SPECIFICATIONS .
- Repeat procedure for RR wheel until all the air in the fluid is completely bled out. Tighten the bleeder plug to specification. See TORQUE SPECIFICATIONS . The air bleeding of the front and rear brake system finishes if the display shown on the Toyota hand-held tester displays COMPLETE.

Fig 1: Locating DLC3 Connector (Prius)

Fig 2: Locating Motor Relays No. 1 & 2 (Prius)