ABS Automated Bleed Procedure With Pressure

Notice

Use only DOT 3 brake fluid from a clean, sealed container. Do not use any fluid from a container which is wet with water. Do not use DOT 5 silicone fluid.

Notice

Pressure bleeding equipment must be of the diaphragm type. It must have a rubber diaphragm between the air supply and the brake fluid to prevent air, moisture, and other contaminants from entering the hydraulic system.

Important

Prior to bleeding the rear brakes, the rear displacement cylinder pistons must be returned to the top most position or HOME. To return the pistons to home (top most position), use the PDT, or equivalent to perform SPECIAL TEST, RUN ABS MOTORS, PISTON UP-HOME. This test will run the piston to the top of their travel.

1. Clean brake fluid reservoir cap and area around cap. Remove cap.
2. Fill the master cylinder reservoir with clean brake fluid and keep reservoir at least one half full during the bleed operation.
3. Install the bleeder adaptor SA9150BR (or equivalent) to the brake fluid reservoir.
4. Connect pressure bleeder to adapter.
5. Charge pressure bleeder equipment to 207-242 kPa (30-35 psi).




6. Bleed brake modulator assembly:
1. Attach a transparent tube over the rear modulator assembly bleeder valve and allow the tube to hang submerged in a clean container partially filled with brake fluid.
2. Slowly open bleeder valve 1/2 to 3/4 turn and allow fluid to flow until no air is seen in the fluid.
3. Close the bleeder valve.
Tighten:

7 N·m (62 lb in)

4. Repeat steps 6.1 to 6.3 for the front modulator assembly bleeder valve.




7. Bleed the calipers (and wheel cylinders if vehicle has rear drum brakes) in the following order.
• A. Right rear
• B. Left rear
• C. Right front
• D. Left front
1. Attach a transparent tube over the caliper assembly bleeder valve and allow the tube to hang submerged in a clean container partially filled with brake fluid.
2. Open bleeder valve 1/2 to 3/4 turn and allow fluid to flow until no air is seen in the fluid.
3. Close bleeder valve.
Tighten:

11 N·m (97 lb in)

Tighten:

7.5 N·m (66 lb in)

Important

To assist in freeing entrapped air, tap lightly on caliper casting with a rubber mallet.

4. Repeat step 7.1 through 7.3 for each wheel in the order specified above, until no air is present in any brake lines.
8. Check the brake pedal for firm constant feel and travel both with the engine Off (ignition On) and with the engine running.
If pedal feel is firm and constant and travel is not excessive, go to step 9. If pedal feel is not firm and constant or travel is excessive.
1. Use PDT, or equivalent to RUN ABS MOTORS, PISTONS UP-HOME and PISTONS DOWN-REL two times.
2. Use scan tool, home pistons.
3. Start engine and let it run for two seconds after the ABS light goes out.
4. Turn Off engine.
5. Repeat steps 8.3 and 8.4 nine more times.
6. Bleed entire brake system again.
9. Check for leaks with engine running and brakes applied.
10. Road test the vehicle.
1. Make several normal (non-ABS) stops from a moderate speed.
2. Make one to two ABS stops from a higher speed at approximately 80 km/h (50 mph).
11. After road testing the vehicle, it is recommended that the system be bled again following the steps 1 through 7 and then inspected again. If after inspection the pedal feels firm and constant and pedal travel is not excessive, system is properly bled.