BRAKE FLUID BLEEDING

CAUTION / NOTICE / HINT

Note

Perform air bleeding with the shift lever in P and the parking brake applied.
As brake fluid may overflow when bleeding, do not place the brake fluid can on the brake master cylinder reservoir assembly filler opening.
Perform air bleeding while maintaining the brake fluid level between the MAX and MIN lines on the brake master cylinder reservoir assembly.
Air bleeding will be difficult if the following occurs:

The brake actuator hose (the hose between the brake booster pump assembly and brake master cylinder reservoir assembly) is higher than the brake fluid level and air enters the brake actuator hose.
During the bleeding procedure, air enters the brake booster pump assembly while it is operating.

With the battery connected, the brake control system operates when a door courtesy switch or brake pedal is operated even with the engine switch off. Therefore, if performing any work where it is possible for air to become trapped inside the brake actuator hose, disconnect the 2 brake booster pump connectors before work.
While performing air bleeding, the accumulator pressure drop may cause a buzzer to sound. As there is no problem, continue with air bleeding.
During air bleeding, DTCs for pressure sensor malfunctions, etc. may be stored. After air bleeding and if instructed in the procedures, clear the DTCs.
Do not allow brake fluid on any painted vehicle body surface. If brake fluid leaks onto any painted surface, immediately wash 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 actuator assembly	Bleed brake system
Brake master cylinder reservoir assembly
Brake stroke simulator cylinder sub-assembly
Brake master cylinder sub-assembly

When bleeding air from the brake fluid, do not use a method that applies a negative pressure.*
Removal and installation procedures for the actuator assembly are included in the removal and installation and replacement procedures for the brake stroke simulator cylinder sub-assembly and brake master cylinder sub-assembly. As a result, make sure to perform air bleeding. Do not select "Master Cylinder or Stroke Simulator has been removed" for the air bleeding selection.

Tech Tips

As the actuator in the ECB (Electronically Controlled Brake) system contains complex fluid pathways, gas dissolved in the brake fluid can vaporize and cause bubbles under low pressure.

PROCEDURE

BLEED BRAKE LINE
CAUTION:

The GTS must be used for air bleeding. If not used, the air bleeding will be incomplete, which is hazardous and may lead to an accident.
1. Remove the brake master cylinder reservoir filler cap assembly.
2. Add brake fluid to the brake master cylinder reservoir assembly until the brake fluid level is between the MAX and MIN lines on the brake master cylinder reservoir assembly.
  
  Brake Fluid
  
  SAE J1703 or FMVSS No. 116 DOT3
  Note
  - Make sure that there is sufficient brake fluid in the brake master cylinder reservoir assembly.
  - Do not remove the filter from the brake master cylinder reservoir assembly and be sure to fill the brake master cylinder reservoir assembly with new brake fluid to avoid any potential contamination of the brake system. Contamination, for example by dirt particles or mineral oil, could lead to functional brake problems.
3. Connect the GTS to the DLC3 and turn the engine switch on (IG).
4. Turn the GTS on and enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Air Bleeding.
  
  Chassis > ABS/VSC/TRAC > Utility
  
  Tester Display
  
  Air Bleeding
5. Select "Usual air bleeding / All Line" and bleed the brake line by following the instructions on the GTS.
6. After air bleeding, tighten each bleeder plug.
  
  Torque:
  
  10.8 N*m { 110 kgf*cm, 8 ft.*lbf }
7. Clear the DTCs.
  
  Click here
8. Turn the GTS off and turn the engine switch off.
9. Disconnect the GTS from the DLC3.
10. Inspect for brake fluid leaks.
11. Inspect and adjust the brake fluid level in the brake master cylinder reservoir assembly.
  
  Click here
12. Install the brake master cylinder reservoir filler cap.
BLEED BRAKE SYSTEM
CAUTION:

The GTS must be used for air bleeding. If not used, the air bleeding will be incomplete, which is hazardous and may lead to an accident.
1. With the engine switch off, disconnect the 2 brake booster pump connectors.
  
  Tech Tips
  
  If the 2 brake booster pump connectors are already disconnected, this procedure is unnecessary.
2. Remove the brake master cylinder reservoir filler cap assembly.
3. *a MIN Line
  
  Drain the brake fluid in the brake master cylinder reservoir assembly to near the MIN line.
4. Connect the GTS to the DLC3 and turn the engine switch on (IG).
5. Turn the GTS on and enter the following menus: Chassis / ABS/VSC/TRAC / Utility / ECB (Electronically Controlled Brake System) Utility / Zero Down.
  
  Chassis > ABS/VSC/TRAC > Utility
  
  Tester Display
  
  ECB Utility
  
  Tech Tips
  
  Using the GTS to perform zero down causes the pressurized brake fluid in the accumulator to be returned to the brake master cylinder reservoir assembly.
6. When the buzzer sounds, turn the engine switch off.
7. Add brake fluid to the brake master cylinder reservoir assembly until the brake fluid level is between the MAX and MIN lines on the brake master cylinder reservoir assembly.
  
  Brake Fluid
  
  SAE J1703 or FMVSS No. 116 DOT3
  Note
  - Make sure that there is sufficient brake fluid in the brake master cylinder reservoir assembly.
  - Do not remove the filter from the brake master cylinder reservoir assembly and be sure to fill the brake master cylinder reservoir assembly with new brake fluid to avoid any potential contamination of the brake system. Contamination, for example by dirt particles or mineral oil, could lead to functional brake problems.
8. Turn the engine switch on (IG).
9. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Air Bleeding.
  
  Chassis > ABS/VSC/TRAC > Utility
  
  Tester Display
  
  Air Bleeding
10. Select "Actuator has been removed" and bleed the brake system by following the instructions on the GTS.
11. After air bleeding, tighten each bleeder plug.
  
  Torque:
  
  10.8 N*m { 110 kgf*cm, 8 ft.*lbf }
12. Clear the DTCs.
  
  Click here
13. Turn the GTS off and turn the engine switch off.
14. Disconnect the GTS from the DLC3.
15. Inspect for brake fluid leaks.
16. Inspect and adjust the brake fluid level in the brake master cylinder reservoir assembly.
  
  Click here
17. Install the brake master cylinder reservoir filler cap assembly.