BRAKE FLUID BLEEDING

CAUTION / NOTICE / HINT

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.

Note


  • Perform air bleeding with the shift lever in P and the parking brake applied.

  • As brake fluid may overflow when bleeding, do not stand the fluid can on the reservoir inlet.

  • 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 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 during the linear valve offset calibration procedure.

  • 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 work procedure according to the table below.

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

PROCEDURE


  1. BLEED BRAKE LINE


    1. Remove the center cowl top ventilator louver.


    2. Bleed brake line.


      1. Remove the brake master cylinder reservoir filler cap assembly.

      2. Add brake fluid into the reservoir between the MAX and MIN lines on the brake fluid reservoir.

        Brake fluid
        SAE J1704 or FMVSS No. 116 DOT4

        Note

        Do not remove the filter from the brake master cylinder reservoir and be sure to fill 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 ignition switch to ON (IG).

      4. Turn the GTS on and enter the following menus: Chassis / ABS/VSC/TRC / Utility / Air Bleeding.

      5. Select "Usual air bleeding" on the GTS display, and bleed air from the brake fluid following the instructions on the GTS.

      6. After air bleeding, tighten each bleeder plug.

        Torque:
        Front bleeder plug
        17 N*m  { 173 kgf*cm, 13 ft.*lbf }
        Rear bleeder plug
        14 N*m  { 143 kgf*cm, 10 ft.*lbf }

      7. Clear the DTCs Click here.

      8. Turn the GTS off and turn the ignition switch off.

      9. Install the brake master cylinder reservoir filler cap.

    3. Inspect for brake fluid leaks.

    4. Install the center cowl top ventilator louver.


  2. BLEED BRAKE SYSTEM


    1. Remove the outer cowl top panel.


    2. Bleed the brake system.


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

        A01UXS2E02
        Text in Illustration
        *A for LHD *B for RHD

        Note

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

        Tech Tips

        This procedure is not required if the reservoir level switch connector has been disconnected.

      2. Remove the brake master cylinder reservoir filler cap assembly.

      3. Add brake fluid into the reservoir between the MAX and MIN lines on the brake fluid reservoir.

        Brake fluid
        SAE J1704 or FMVSS No. 116 DOT4

        Note

        Do not remove the filter from the brake master cylinder reservoir and be sure to fill 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.

      4. Connect the GTS to the DLC3 and turn the ignition switch to ON (IG).

      5. Turn the GTS on and enter the following menus: Chassis / ABS/VSC/TRC / Air Bleeding.

      6. Select "ABS actuator has been replaced" on the GTS display, and bleed air from the brake fluid following the instructions on the GTS.

        Note

        Before following the instructions on the GTS to perform linear valve offset calibration, release the parking brake. When calibration is complete, immediately apply the parking brake.

      7. A01V1AEE02
        Text in Illustration
        *1 Stroke Simulator Bleeder Plug

        After air bleeding, tighten each bleeder plug.

        Torque:
        Front bleeder plug
        17 N*m  { 173 kgf*cm, 13 ft.*lbf }
        Rear bleeder plug
        14 N*m  { 143 kgf*cm, 10 ft.*lbf }
        Stroke simulator bleeder plug
        8.5 N*m  { 87 kgf*cm, 75 in.*lbf }

        Tech Tips

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

      8. Clear the DTCs Click here.

      9. Turn the GTS off and turn the ignition switch off.

      10. Install the brake master cylinder reservoir filler cap.

      11. Connect the reservoir level switch connector.

    3. Inspect for brake fluid leaks.

    4. Install the outer cowl top panel.