Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Brake Pressure Modulator Valve Replacement

Caution: Refer to Brake Fluid Irritant Caution.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice.

Removal Procedure

Caution: For safety reasons, the Brake Pressure Modulator Valve (BPMV) must not be repaired; the complete unit must be replaced. With the exception of the EBCM/EBTCM, no screws may be loosened. If screws are loosened, it will not be possible to get the brake circuits leak-tight and personal injury may result.

1. Turn the ignition switch to the OFF position.
2. Raise the vehicle.
3. Disconnect the electronic brake control module (EBCM) harness connector.





Important: Note the locations of the brake pipes in order to aid in installation.

4. Disconnect the right front brake pipe (1) from the brake pressure modulator valve (BPMV) (2).




5. Disconnect the rear brake pipes (1) from the BPMV (2).




6. Disconnect the left front and the master cylinder brake pipes (1) from the BPMV (2).
7. Remove the 2 nuts that connect the BPMV to the BPMV bracket.
8. Remove the BPMV (2) and EBCM as an assembly from the vehicle.
9. Remove EBCM if replacing the BPMV only.

Installation Procedure




1. Install EBCM if replacing the BPMV only.
2. Install BPMV (2) and EBCM as an assembly into the BPMV bracket. Align the flats of the studs on the BPMV with the BPMV bracket.

Notice: Refer to Fastener Notice.

3. Install the 2 BPMV to BPMV bracket nuts.

Tighten the 2 BPMV to BPMV bracket nuts to 12 N.m (8 lb ft).

Caution: Make sure brake pipes are correctly connected to brake pressure modulator valve. If brake pipes are switched by mistake, wheel lockup will occur and personal injury may result. The only two ways this condition can be detected are by using a Scan Tool or by doing an Antilock stop.

Important: If a new BPMV is being installed, remove the shipping plugs from the valve openings in the compartment during the next step.

Important: Use the locations noted during removal.

4. Connect the left front and the master cylinder brake pipes (1) to the BPMV (2).




5. Connect the rear brake pipes (1) to the BPMV (2).




6. Connect the right front brake pipe (1) to the BPMV (2).

Tighten all of the brake pipe fittings to 15 N.m (11 lb ft).

7. Connect the EBCM harness connector.
8. Lower the vehicle.
9. Fill and bleed the brake hydraulic system.
10. Turn the ignition switch to the RUN position, engine OFF.
11. Perform the vehicle diagnostic system check.