BRAKE FLUID(w/ VSC) BLEEDING

CAUTION / NOTICE / HINT

Tech Tips

If any work is performed on the brake system or if air in the brake lines is suspected, bleed air from the brake system.

Note

for Manual Transmission:

Move the shift lever to neutral and apply the parking brake before bleeding the brakes.
for Automatic Transmission:

Move the shift lever to P and apply the parking brake before bleeding the brakes.
Add brake fluid to keep the level between the MIN and MAX lines of the reservoir while bleeding the brakes.
If brake fluid leaks onto any painted surface, immediately wash it off.

When bleeding air, select the suitable procedure listed below.

Replaced/Installed Item	Work procedure
Flexible hose (front/rear)	Bleed brake line
Front disc brake cylinder assembly
Rear wheel cylinder assembly
Brake actuator assembly	Bleed brake system
Brake master cylinder sub-assembly
Brake master cylinder reservoir assembly
Brake booster assembly

PROCEDURE

BLEED BRAKE LINE
1. Remove the brake master cylinder reservoir filler cap assembly.
2. Add brake fluid to keep the level between the MIN and MAX lines of the reservoir while bleeding the brakes.
  
  Brake fluid
  
  SAE J1703 or FMVSS No. 116 DOT 3
  
  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. Loosen the bleeder plug of the front disc brake cylinder RH.
4. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the front disc brake cylinder RH
  
  Note
  
  Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.
5. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.
  
  Torque:
  
  for 4WD and Pre-Runner
  
  10.8 N*m { 110 kgf*cm, 8 ft.*lbf }
  
  for 2WD
  
  8.3 N*m { 85 kgf*cm, 73 in.*lbf }
6. Bleed the air from the bleeder plug of the front disc brake cylinder LH using the same procedure as for the RH side.
7. Loosen the bleeder plug of the rear wheel brake cylinder RH.
8. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the rear wheel brake cylinder RH.
  
  Note
  
  Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.
9. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.
  
  Torque:
  
  for 4WD and Pre-Runner
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
  
  for 2WD
  
  11 N*m { 112 kgf*cm, 8 ft.*lbf }
10. Bleed the air from the bleeder plug of the rear wheel brake cylinder LH using the same procedure as for the RH side.
11. Inspect for brake fluid leaks.
12. Inspect brake fluid level in reservoir.
  
  Click here
13. Check and clear the DTCs.
  
  Click here
BLEED BRAKE SYSTEM

CAUTION:

If air is bled without using the GTS, damage or accidents may result. Therefore, always use the GTS when bleeding air.

Note

Be sure to clean your hands before bleeding from the master cylinder to avoid any potential contamination of the brake system. Contamination, for example by dirt particles or mineral oil, could lead to functional brake problems.
1. Remove the brake master cylinder reservoir filler cap assembly.
2. Add brake fluid to keep the level between the MIN and MAX lines of the reservoir while bleeding the brakes.
  
  Brake fluid
  
  SAE J1703 or FMVSS No. 116 DOT3
  
  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. Using a union nut wrench, disconnect the 2 brake lines from the brake master cylinder.
  
  *A for LHD *B for RHD
  Note
  - Do not kink or damage the brake lines.
  - Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
4. Slowly depress and hold the brake pedal.*1
5. Block the outer holes with your fingers, and release the pedal.*2
  
  *A for LHD *B for RHD
6. Repeat steps *1 and *2, 3 or 4 times.
7. *a Torque Wrench Fulcrum Length
  
  Using a union nut wrench, connect the 2 brake lines to the brake master cylinder.
  
  Torque:
  
  Specified tightening torque
  
  19.5 N*m { 199 kgf*cm, 14 ft.*lbf }
  Tech Tips
  - Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.
    
    Click here
  - When using a union nut wrench (fulcrum length of 20 mm (0.7874 in.)) + torque wrench (fulcrum length of 162 mm (6.3779 in.)): 17.4 N*m (177 kgf*cm, 13 ft.*lbf)
8. Loosen the bleeder plug of the front disc brake cylinder assembly RH.
9. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the front disc brake cylinder assembly RH.
  
  Note
  
  Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.
10. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.
  
  Torque:
  
  for 4WD and Pre-Runner
  
  10.8 N*m { 110 kgf*cm, 8 ft.*lbf }
  
  for 2WD
  
  8.3 N*m { 85 kgf*cm, 73 in.*lbf }
11. Bleed the air from the bleeder plug of the front disc brake cylinder LH using the same procedure as for the RH side.
12. Loosen the bleeder plug of the rear wheel brake cylinder RH.
13. Repeatedly depress the brake pedal and bleed the air from the bleeder plug of the rear disc brake cylinder RH.
  
  Note
  
  Add fluid as necessary so that the fluid in the reservoir does not decrease below the MIN level.
14. After air is completely bled out, tighten the bleeder plug while depressing the brake pedal.
  
  Torque:
  
  for 4WD and Pre-Runner
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
  
  for 2WD
  
  11 N*m { 112 kgf*cm, 8 ft.*lbf }
15. Bleed the air from the bleeder plug of the rear wheel brake cylinder LH using the same procedure as for the RH side.
16. Depress the brake pedal more than 20 times with the engine off.
17. Connect the GTS to the DLC3, and turn the ignition switch to ON.
  
  Note
  
  Do not start the engine.
18. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Air Bleeding.
  
  Chassis > ABS/VSC/TRC > Utility
  
  Tester Display
  
  Air Bleeding
19. Bleed the brake system following the instructions on the GTS.
20. After air bleeding, tighten each bleeder plug.
  
  Torque:
  
  for 4WD and Pre-Runner (Front Brake)
  
  10.8 N*m { 110 kgf*cm, 8 ft.*lbf }
  
  for 2WD (Front Brake)
  
  8.3 N*m { 85 kgf*cm, 73 in.*lbf }
  
  for 4WD and Pre-Runner (Rear Brake)
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
  
  for 2WD (Rear Brake)
  
  11 N*m { 112 kgf*cm, 8 ft.*lbf }
21. Turn the GTS off and turn the ignition switch off.
22. Disconnect the GTS from the DLC3.
23. Check for brake fluid leaks.
24. Check the fluid level in the reservoir.
  
  Click here
25. Check and clear DTCs.
  
  Click here