Grand Prix V6-204 3.4L DOHC (1992)
Brake Bleeding: Service and Repair
With ABS System
Manual Bleeding
ABS BLEEDING PROCEDURES
Prior to bleeding the brakes, the front and rear displacement cylinder pistons must be returned to the top most position. Using a TECH 1 or T-100
(CAMS), enter the manual control function and "apply" the front and rear motors. Be sure the enable relay is "ON."
If a TECH 1 or T-1OO are not available, bleed the front brakes. Start engine and allow it to run for at least 10 seconds, (with foot off brake) this
will cause the ABS to initialize itself. This will return the front and rear displacement cylinders to the top position. The entire brake system should
now be rebled.
CAUTION: Use ONLY DOT 3 brake fluid from a clean, sealed container. Do NOT use fluid from an open container that may be contaminated with
water. Do NOT use DOT 5 brake fluid.
(Figure 1) Bleeding Brakes
MANUAL BLEEDING
In the following steps, use a suitable container and/or shop cloths to catch fluid and prevent it from contacting any painted surfaces. Follow ALL
the steps below to complete system bleeding.
1. Clean reservoir cover and surrounding area.
2. Remove reservoir cover and inspect fluid level. Fill to the correct level if necessary and then reinstall reservoir cover.
3. Prime ABS hydraulic modulator and master cylinder assembly.
4. Attach bleeder hose to rearward bleeder valve and submerge opposite hose end in clean container partially filled with brake fluid.
5. Open rearward bleeder valve 1/2 to 3/4 turns and depress brake pedal until fluid begins to flow. Close valve and release brake pedal. Repeat until
no air bubbles are present.
6. Repeat procedure for forward bleeder valve until fluids begins to flow.
NOTE: Once fluid is seen to flow from both modulator bleeder valves, the ABS hydraulic modulator and master cylinder assembly is sufficiently
full of fluid. However, it may not be completely purged of air. At this point move to the wheel brakes and bleed them. This ensures that the lowest
points in the system are completely free of air and THEN the ABS hydraulic modulator and master cylinder assembly can be purged of any
remaining air.
7. Remove reservoir cover and inspect fluid level. Fill to the correct level if necessary and then reinstall reservoir cover.
8. Raise vehicle and suitably support.
NOTES:
^
Bleed wheel brakes in sequence shown below:
a. Right rear.
b. Left rear.
c. Right front.
d. Left front.
^
To assist in freeing entrapped air from calipers, tap LIGHTLY on caliper castings with a rubber mallet.
