Diesel Data: Automotive Repair
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Brake Bleeding: Service and Repair








BRAKE: BRAKE FLUID: BLEEDING

BLEEDING
CAUTION: Bleeding without the Techstream may result in the air not being completely bled. As this can result in an accident, be sure to use the Techstream for air bleeding.
NOTICE:
- Move the shift lever to the P position and apply the parking brake before bleeding air.
- Add brake fluid carefully so that it remains between the MIN and MAX lines of the reservoir while bleeding air.
- Brake fluid may overflow when bleeding the brake actuator hose. Do not place the fluid can on the reservoir inlet.
- If the pump motor operates while there is air remaining inside the brake actuator hose, the air will enter the actuator, resulting in difficulty of air bleeding. Remove the No. 1 and No. 2 motor relays until instructed to reinstall them in order to prevent air from coming into the brake actuator hose.
- The actuator pump motor and master pressure cut-off solenoid can operate through a supplemental power source even if the power switch is OFF.
- A buzzer may sound due to the accumulator pressure decline during air bleeding. However, continue bleeding.
- DTCs for problems such as No. 1 and No. 2 motor relay malfunctions and pressure sensor malfunctions are stored after bleeding. Clear the DTCs when instructed during or after bleeding.
- Bleed the brake actuator hose if air enters as a result of the decline of reservoir fluid.

1. PREPARE FOR BLEEDING
(a) Move the shift lever to the P position and apply the parking brake.
(b) Connect the Techstream to the DLC3 with the power switch OFF as shown in the illustration.
(c) Turn the power switch ON (IG) and turn on the Techstream.
NOTE: Do not start the engine.

(d) Enter the following menus: Chassis / ABS/VSC/TRC / Air Bleeding.
(e) Select "AIR BLEEDING".
(1) Select " Usual air bleeding" if the front/rear brakes were removed, installed or disassembled.
HINT: Go to "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" if " Usual air bleeding" is selected.
(2) Select "Actuator has been removed" if the actuator is removed, installed or replaced.
NOTE: Be sure to release the pressure out of the actuator before removing. Replacement
HINT: Go to "BLEED AIR FROM BRAKE ACTUATOR" if "Actuator has been removed" is selected.
(3) Select "Master Cylinder or Stroke Simulator has been removed" if the brake master cylinder or the brake stroke simulator was removed, installed or replaced.
HINT: Go to "BLEED AIR FROM MASTER CYLINDER/STROKE SIMULATOR" if "Master Cylinder or Stroke Simulator has been removed" is selected.





(f) Remove and install the relays as shown in the illustration if instructed to remove and install No. 1 and No. 2 motor relays by the Techstream.
2. FILL RESERVOIR WITH BRAKE FLUID
NOTE: Wash brake fluid off immediately if it adheres to any painted surface.

(a) Add brake fluid into the reservoir.
Fluid:
SAE J1703 or FMVSS No. 116 DOT3
3. BLEED AIR FROM MASTER CYLINDER




HINT: If the master cylinder has been disassembled or if the reservoir becomes empty, bleed the air out of the master cylinder.

(a) Disconnect the brake lines from the master cylinder.
SST: 09023-00100
(b) Slowly depress and hold the brake pedal.





(c) Cover the outer holes with your fingers, and release the brake pedal.
(d) Repeat the above steps 3 or 4 times.
(e) Connect the brake lines to the master cylinder.
SST: 09023-00100
Torque: 15 Nm (155 kgf-cm, 11 ft-lbf)
4. BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS




NOTE: Wash brake fluid off immediately if it adheres to any painted surface.
HINT: Bleed the air out of the front and rear brake systems in accordance with the display (see illustration for reference).

(a) Remove the No. 1 and No. 2 motor relays.
NOTICE:
- Remove the No. 1 and No. 2 motor relays before bleeding the air out of the front brake system.
- Be sure to turn the power switch OFF before removing the No. 1 and No. 2 motor relays.





(b) Bleed the air out of the FR/FL wheels if the display (see illustration for reference) appears.
(1) Remove the bleeder plug cap.
(2) Connect the vinyl tube to the bleeder plug.
(3) Depress the brake pedal several times, then loosen the bleeder plug with the brake pedal depressed.
(4) When the fluid stops coming out, tighten the bleeder plug, and then release the brake pedal.
Torque: 8.4 Nm (86 kgf-cm, 74 in-lbf)
(5) Repeat the above steps until all the air in the fluid is completely bled out.
(6) Install the bleeder plug cap.
(7) Repeat the previous procedures to bleed the air out of the brake line for each wheel.





(c) Install the No. 1 and No. 2 motor relays.
NOTICE:
- Install the No. 1 and No. 2 motor relays before bleeding the air out of the rear brake system.
- Be sure to turn the power switch OFF before installing the No. 1 and No. 2 motor relays.





(d) Bleed the air out of the RL wheel if the display (see illustration for reference) appears.
(1) Remove the bleeder plug cap of RL wheel.
(2) Connect the vinyl tube to the bleeder plug of RL wheel.
(3) Depress the brake pedal and loosen the bleeder plug of RL wheel until all the air in the fluid is completely bled out.
NOTE: Do not pump the brake pedal. Hold the brake pedal depressed when bleeding the air out of the rear brake system.
HINT: The actuator motor relay starts operation and oil pressure is applied to the rear brake system if the brake pedal is depressed, which allows air bleeding through the bleeder plug.
(4) Tighten the bleeder plug if the air is completely bled out.
Torque: 8.4 Nm (86 kgf-cm, 74 in-lbf)





(e) Bleed the air out of the RR wheel if the display (see illustration for reference) appears.
(1) Remove the bleeder plug cap of RR wheel.
(2) Connect the vinyl tube to the bleeder plug of RR wheel.
(3) Depress the brake pedal and loosen the bleeder plug of RR wheel until all the air in the fluid is completely bled out.
NOTE: Do not pump the brake pedal. Hold the brake pedal depressed when bleeding the air out of the rear brake system.
HINT: The actuator motor relay starts operation and oil pressure is applied to the rear brake system if the brake pedal is depressed, which allows air bleeding through the bleeder plug.





(f) The air bleeding of the front and rear brake system finishes if the display (see illustration for reference) appears.
5. BLEED AIR FROM BRAKE ACTUATOR
NOTE: Wash brake fluid off immediately if it adheres to any painted surface.
HINT: Bleed the air out of the brake actuator in accordance with the display.

(a) Bleed the air out of the FR/FL wheels if the display appears.
HINT: See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding the air out of the front brake system.

(b) Bleed the air out of the drain line.
NOTE: Be sure to perform this procedure if air remains in the actuator hose.
HINT: Fluid inside the actuator hose returns to the reservoir tank when performing this procedure.

(c) Depress the brake pedal 30 times within 30 seconds while the solenoid is operating.
HINT: The solenoid stops operation automatically after approximately 30 seconds.

(d) Install the No. 1 and No. 2 motor relays.
NOTICE:
- Install the No. 1 and No. 2 motor relays before bleeding the air out of the rear brake system.
- Be sure to turn the power switch OFF before installing the No. 1 and No. 2 motor relays.

(e) Bleed the air out of the rear brake RL wheel.
HINT: See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding the air out of the rear brake system.

(f) Bleed the air out of the rear brake RR wheel.
HINT: See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding the air out of the rear brake system.

(g) Loosen the bleeder plug of FL wheel.
(h) Bleed the air out of the power supply line.
HINT: Air can be bled out of the high pressure line inside the actuator when performing this procedure.

(i) Tighten the bleeder plug of FL wheel.
Torque: 8.4 Nm (86 kgf-cm, 74 in-lbf)
(j) Bleed the air out of the stroke simulator line.
HINT:
- See "BLEED AIR FROM BRAKE MASTER CYLINDER/STROKE SIMULATOR" for bleeding the air out of the stroke simulator.
- Bleed the air out of the stroke simulator twice.
- The number of times air is bled is displayed as 1/2 (first) and 2/2 (second).
(1) Depress the brake pedal 20 times in 20 seconds.
HINT: Depress the brake pedal 20 times at 1 second intervals, holding the pedal down on the last depression.
(2) Perform the usual air bleeding for the FL wheel.
HINT:
- Loosen the bleeder plug of the FL wheel and bleed the air with the brake pedal depressed.
- See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding instructions.

(k) Refresh the high pressure line.
NOTICE:
- Drain brake fluid in the reservoir near the "LOW" level before refreshing.
- Keep the fluid inside the reservoir above the "LOW" level by replenishing fluid.
HINT:
- Accumulator pressure is released and accumulated repeatedly, which circulates the fluid inside the accumulator when performing this procedure.
- The high pressure line is refreshed 5 times. The number of times refreshed is displayed as 1/5 (first), 2/5 (second), etc.
- Count down from 20 seconds.

(l) Turn the power switch OFF. Turn the power switch ON (IG) and check if the ABS motor pump runs and stops.
HINT: The pump motor rotates and the accumulator is pressurized every time the power switch is turned from OFF to ON (IG).

(m) Return to "MENU".
6. BLEED AIR FROM MASTER CYLINDER/STROKE SIMULATOR




NOTE: Wash brake fluid off immediately if it adheres to any painted surface.
HINT: Bleed the air out of the master cylinder/stroke simulator in accordance with the display (see illustration for reference).

(a) Remove the No. 1 and No. 2 motor relays.
NOTICE:
- Remove the No. 1 and No. 2 motor relays before bleeding the air out of the front brake system.
- Be sure to turn the power switch OFF before removing the No. 1 and No. 2 motor relays.





(b) Bleed the air out of the FR/FL wheels in accordance with the display (see illustration for reference).
HINT:
- Air can be completely bled out of the master cylinder by performing this procedure.
- See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding instructions.





(c) Install the No. 1 and No. 2 motor relays.
NOTICE:
- Install the No. 1 and No. 2 motor relays before bleeding the air out of the stroke simulator.
- Be sure to turn the power switch OFF before installing the No. 1 and No. 2 motor relays.

(d) Bleed the air out of the stroke simulator line.




HINT:
- Bleed the air out of the stroke simulator twice.
- The number of times air is bled is displayed as 1/2 (first) and 2/2 (second).




(1) Depress the brake pedal 20 times in 20 seconds.
HINT: Depress the brake pedal 20 times at 1 second intervals, holding the brake pedal down on the last depression.




(2) Perform the usual air bleeding for the FL wheel.
HINT:
- Loosen the bleeder plug of the FL wheel and bleed the air with the brake pedal depressed.
- See "BLEED AIR FROM FRONT AND REAR BRAKE SYSTEMS" for bleeding instructions.





(e) The air bleeding of the master cylinder/stroke simulator finishes if the display (see illustration for reference) appears.
7. CHECK AND CLEAR DTC
(a) Check and clear the DTC Reading and Clearing Diagnostic Trouble Codes.
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