Brake Fluid: Service and Repair

BRAKE SYSTEM (OTHER): BRAKE FLUID: REPLACEMENT

HINT
There are 2 ways of brake fluid replacement: using the Techstream or not using the Techstream.

NOTICE:
* Perform fluid replacement with park (P) selected and the parking brake applied.
* As brake fluid may overflow when replacing brake fluid, do not place the fluid can on the reservoir filler opening.
* Perform fluid replacement while maintaining the brake fluid level between the MIN/MAX level on the brake fluid reservoir.
* Replacing brake fluid will be difficult if the following occurs:
(1) The brake actuator hose (the hose between the brake booster pump and brake fluid reservoir) is higher than the fluid level and air enters the hose.
(2) During the fluid replacement procedure, air enters the brake booster pump while the pump motor is operating.
* While performing fluid replacement, the accumulator pressure drop may cause a buzzer to sound. As there is no problem, continue with the fluid replacement.
* During fluid replacement, DTCs for pressure sensor malfunctions, etc. may be stored. After fluid replacement and if instructed in the procedures, clear the DTCs.
* 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.

1. REPLACE BRAKE FLUID (for Using the Techstream)

NOTICE:
* Add brake fluid carefully and check that the reservoir level remains between the MIN and MAX lines.
* Do not stand the fluid can on the reservoir inlet. Doing so will cause brake fluid to overflow.

(a) Disengage the 5 claws and 2 guides to remove the center cowl top ventilator louver.

(b) Replace brake fluid.

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

(2) Add brake fluid into the reservoir between the MAX and MIN level 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/TRAC / Air Bleeding.

(5) Select "Usual air bleeding" on the Techstream display, and replace the brake fluid following the instructions on the Techstream.

(6) After replacing brake fluid, tighten each bleeder plug.

front bleeder plug - Torque : 8.3 Nm (85 kgf-cm, 73 in-lbf)

rear bleeder plug - Torque : 11 Nm (112 kgf-cm, 8 ft-lbf)

(c) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(d) Turn the Techstream off and turn the power switch off.

(e) Inspect for brake fluid leaks.

(f) Install the brake master cylinder reservoir filler cap.

(g) Engage the 5 claws and 2 guides to install the center cowl top ventilator louver.

2. REPLACE BRAKE FLUID (for not Using the Techstream)

NOTICE:
* Performing the following procedure will select ECB (Electronically Controlled Brake system) Invalid Mode without using the Techstream.
* ECB (Electronically Controlled Brake system) Invalid Mode allows the brake fluid to be replaced without using the Techstream.
* The brake warning light / yellow will blink to indicate when ECB (Electronically Controlled Brake system) Invalid Mode is selected.
* Be sure to inspect that the brake warning light / yellow is blinking while replacing the brake fluid.
* When one of the following conditions is met, ECB (Electronically Controlled Brake system) Invalid Mode is cancelled, and DTCs may be stored. Do not cancel ECB (Electronically Controlled Brake system) Invalid Mode while replacing brake fluid.

* Do not rotate the brake disc while ECB (Electronically Controlled Brake system) Invalid Mode is selected.
* When replacing the brake fluid from the brake line, do not depress the brake pedal to operate the brake booster pump for more than 100 seconds. If the brake booster pump is operated more than 100 seconds, ECB (Electronically Controlled Brake system) Invalid Mode is automatically finished and the DTCs may be stored.
* Add brake fluid carefully and check that the reservoir level remains between the MIN and MAX lines.
* Do not stand the fluid can on the reservoir inlet. Doing so will cause brake fluid to overflow.

(a) Remove all 4 wheels.

(b) Select ECB (Electronically Controlled Brake system) Invalid Mode.

(1) Perform the procedure listed below within 1 minute.

1 Turn the power switch on (IG) with park (P) selected and the parking brake applied.

2 Select N and then depress the brake pedal more than 8 times in 5 seconds.

3 Push the P position switch and then depress the brake pedal more than 8 times in 5 seconds.

4 Select N and then depress the brake pedal more than 8 times in 5 seconds.

5 Push the P position switch.

(2) Check that the brake warning light / yellow is blinking.

Text in Illustration

(d) Replace the brake fluid.

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

(2) Add brake fluid into the reservoir between the MAX and MIN level on the brake fluid reservoir.

Brake fluid:

SAE J1703 or FMVSS No. 116 DOT3

(3) Connect a vinyl tube to the bleeder plug of the front disc brake cylinder assembly RH.

(4) Depress the brake pedal several times, and then loosen the bleeder plug with the pedal depressed.*1

(5) When fluid stops coming out, tighten the bleeder plug, and then release the brake pedal.*2

(6) Repeat *1 and *2 until all the air in the brake fluid is completely bled out and new brake fluid comes out.

(7) Tighten the bleeder plug completely.

Torque : 8.3 Nm (85 kgf-cm, 73 in-lbf)

(8) Replace the brake fluid from the front disc brake cylinder assembly LH using the same procedure as for the RH side.

Connect a vinyl tube to the bleeder plug of the rear disc brake cylinder assembly LH.

Loosen the bleeder plug while depressing and holding the brake pedal, and replace the brake fluid with the brake booster pump assembly and solenoid running.*3

NOTICE:
* Be sure to keep the brake pedal depressed.
* Do not depress the brake pedal to operate the brake booster pump for more than 100 seconds. When performing this procedure continuously, release the brake pedal to stop brake booster pump operation and depress the brake pedal again.

(11) Tighten the bleeder plug, then release the brake pedal.*4

(12) Repeat steps *3 and *4 until all the air in the brake fluid is completely bled out and a new brake fluid comes out.

(13) Tighten the bleeder plug completely.

Torque : 11 Nm (112 kgf-cm, 8 ft-lbf)

(14) Replace the brake fluid from the rear disc brake cylinder assembly RH using the same procedure as for the LH side.

(15) Turn the power switch off.

(e) Inspect for brake fluid leaks.

(f) Adjust the brake fluid level in the reservoir Testing and Inspection.

(g) Install the brake master cylinder reservoir filler cap.

(h) Engage the 5 claws and 2 guides to install the center cowl top ventilator louver.

(i) Install the 4 wheels.

Torque : 103 Nm (1050 kgf-cm, 76 ft-lbf)