Brake Fluid: Bleeding: Bleeding

WARNING:

The Techstream must be used for air bleeding. If not used, the air bleeding will be incomplete, which is hazardous and may lead to an accident.

NOTE:

Perform air bleeding with park (P) selected and the parking brake applied.
As brake fluid may overflow when bleeding, do not place the fluid can on the reservoir filler opening.
Perform air bleeding while maintaining the brake fluid level between the MIN and MAX lines on the brake fluid reservoir.
Air bleeding will be difficult if the following occurs:
1. The brake actuator hose (the hose between the brake booster pump assembly and brake fluid reservoir) is higher than the fluid level and air enters the hose.
2. During the air bleeding procedure, air enters the brake booster pump assembly while the pump motor is operating.
While performing air bleeding, the accumulator pressure drop may cause a buzzer to sound. As there is no problem, continue with the operation.
During air bleeding, DTCs for pressure sensor malfunctions, etc. may be stored. After air bleeding and if instructed in the procedures, clear the DTCs.
Release the parking brake before performing the linear valve offset calibration.
Do not allow brake fluid to adhere to any painted surface such as the vehicle body. If brake fluid leaks onto any painted surface, immediately clean it off.

When bleeding air, select the suitable procedure according to the table below.

Replaced/Installed Item	Work Procedure
Flexible hose (front/rear)	Bleed brake line
Disc brake cylinder assembly (front/rear)	Bleed brake line
Brake booster pump assembly	Bleed brake system
Brake booster with master cylinder assembly
Brake master cylinder reservoir assembly

BLEED BRAKE LINE
1. Remove the center No. 1 cowl top ventilator louver.
  1. Disengage 2 claws A and separate the hood to cowl top seal.
    
    Fig 1: Identifying Hood To Cowl Top Seal & Claws (A & B)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Disengage 2 claws B and the 2 guides to remove the center No. 1 cowl top ventilator louver.
2. Bleed the brake line.
  1. Remove the brake master cylinder reservoir filler cap assembly.
    
    Fig 2: Removing Brake Master Cylinder Reservoir Filler Cap Assembly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Add brake fluid into the reservoir between the MAX and MIN lines on the brake fluid reservoir.
    Brake fluid
    
    SAE J1703 or FMVSS No. 116 DOT3
  3. Connect the Techstream to the DLC3 and turn the power switch on (IG).
  4. Turn the Techstream on and enter the following menus: Chassis / ABS/VSC/TRC / Air Bleeding.
  5. Select "Usual air bleeding" on the Techstream display, and bleed air from the brake fluid following the instructions on the Techstream.
  6. After air bleeding, tighten each bleeder plug.
    Torque: 8.3 N*m (85 kgf*cm, 73 in.*lbf)
  7. Clear the DTCs. Refer toDTC CHECK / CLEAR .
  8. Turn the Techstream off and turn the power switch off.
3. Inspect for brake fluid leaks.
4. Install the brake master cylinder reservoir filler cap.
5. Install the center No. 1 cowl top ventilator louver.
  1. Engage the 2 guides and 2 claws B to install the center No. 1 cowl top ventilator louver.
    
    Fig 3: Identifying Hood To Cowl Top Seal & Claws (A & B)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Engage 2 claws A to install the hood to cowl top seal.

BLEED BRAKE SYSTEM

Remove the outer cowl top panel sub-assembly See step 9.

Bleed the brake system.

Wait at least 2 minutes with the power switch off, and disconnect the reservoir level switch connector.

Fig 4: Identifying Reservoir Level Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:
Do not depress the brake pedal or open/close the doors until the reservoir level switch connector is disconnected.

HINT:

This procedure is not required if the reservoir level switch connector has been disconnected.
Remove the brake master cylinder reservoir filler cap assembly.

Fig 5: Removing Brake Master Cylinder Reservoir Filler Cap Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Add brake fluid into the reservoir between the MAX and MIN lines on the brake fluid reservoir.
Brake fluid

SAE J1703 or FMVSS No. 116 DOT3
Connect the Techstream to the DLC3 and turn the power switch on (IG).
Turn the Techstream on and enter the following menus: Chassis / ABS/VSC/TRC / Air Bleeding.
Select "ABS actuator has been replaced" on the Techstream display, and bleed air from the brake fluid following the instructions on the Techstream.
NOTE:
Before following the instructions on the Techstream to perform linear valve offset calibration, release the parking brake. When calibration is complete, immediately apply the parking brake.

After air bleeding, tighten each bleeder plug.

disc brake cylinder bleeder plug

Torque: 8.3 N*m (85 kgf*cm, 73 in.*lbf)

stroke simulator bleeder plug

Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf)

HINT:

The stroke simulator bleeder plug is positioned as shown in the illustration.

Fig 6: Identifying Stroke Simulator Bleeder Plug

TEXT IN ILLUSTRATION

*1	Stroke Simulator Bleeder Plug

Clear the DTCs. Refer toDTC CHECK / CLEAR .
Turn the Techstream off and turn the power switch off.

Install the brake master cylinder reservoir filler cap.
Inspect for brake fluid leaks.
Install the outer cowl top panel sub-assembly See step 22.