Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Brake Pressure Modulator Valve (BPMV) Replacement

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.
Brake Fluid Irritant Caution


Notice: Refer to Brake Fluid Effects on parts and Electrical Components Notice in Service Precautions.
Brake Fluid Effects on Paint and Electrical Components Notice

The area around line Electric Hydraulic Control Unit (EHCU) MUST be free from loose dirt try prevent contamination of disassembled ABS components.







1. Thoroughly wash ail contaminants from around the EHCU.
2. For cutaway vehicles, remove the splash shield.
3. Disconnect the electrical harness connectors from the Electronic Brake Control Module (EBCM)

Important: Make sure that brake fines are lagged and kept in order for proper reassembly

4. Disconnect the brake lines front the brake pressure modulator valve EBCM.







5. Remove the bolts securing the EHCU mounting bracket to the frame rail.
6. Remove the EHCU from the vehicle.







7. Remove the bolts (4) securing the BPMV (1) to the EHCU mounting bracket (3).
8. Disconnect the 2-way ABS pump motor connector.
9. Remove the bolts from the EBCM (2).
10. Remove the EBCM (2) from the BPMV (1). Removal may require a light amount of force.

Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

Important: Do not reuse the EBCM mounting bolts. Always install new bolts.

11. Clean the EBCM to BPMV mounting surfaces with a clean cloth.



Installation Procedure

Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.







1. Install the EBCM (2) onto BPMV (1).

Notice: Refer to Fastener Notice in Service Precautions.
Fastener Notice


Important: Do not reuse the old mounting bolts. Always install new EBCM bolts with the new BPMV.

2. Install the EBCM bolts.
Tighten the bolts to 5 Nm (44 inch lbs.) in an X-pattern.

3. Connect the 2-way ABS pump motor connector to the EBCM.
4. Install the BPMV (1) to EHCU bracket (3).
5. Install the BPMV (1) to bracket retaining bolts (4).
Tighten the bolts to 9 Nm (80 inch lbs.).







6. Install the EHCU to the vehicle frame.
Tighten the 3 EHCU bracket bolts to 25 Nm (18 ft. lbs.).

7. Connect the 2 electrical harness connectors to the EBCM.

Important: The brake pipes are held in place by a plastic bracket mounted to the frame. Make sure that the brake pipes stay in the correct place for proper reassembly.

8. Install the 5 brake pipes to the BPMV.
Tighten the brake pipe fittings to 30 Nm (22 ft. lbs.).







9. For cutaway vehicles, install the splash shield.
10. Bleed the brake system.
11. Bleed the brake system.