Brake Pressure Modulator Valve Replacement w/JL4
Removal Procedure
Caution: Refer to Brake Fluid Irritant Caution in the Preface section.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.
Important: The area around the electric hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of disassembled ABS components.
- Thoroughly wash all contaminants from around the EHCU.
- Disconnect the electrical harness connectors from the electronic brake control module (EBCM).
Important: Make sure that brake lines are tagged and kept in order for proper reassembly.
- Disconnect the brake lines from the brake pressure modulator valve (BPMV).
- Remove the bolts securing the EHCU mounting bracket to the frame rail.
- Remove the EHCU from the vehicle.
- Remove the bolts (4) securing the BPMV (1) to the EHCU mounting bracket (3) .
- Disconnect the 2-way ABS pump motor connector.
Important: Do not reuse the EBCM mounting bolts. Always install new bolts.
- Remove the bolts from the EBCM (2).
Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.
- Remove the EBCM (2) from the BPMV (1). Removal may require a light amount of force.
- 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.
- Install the EBCM (2) onto BPMV (1).
Notice: Refer to Fastener Notice in the Preface section.
Important: Do not reuse the old mounting bolts. Always install new EBCM bolts with the new BPMV.
- Install the EBCM bolts.
Tighten
Tighten the bolts to 5 N·m (44 lb in) in an X-pattern.
- Connect the 2-way ABS pump motor connector to the EBCM.
- Install the BPMV (1) to EHCU bracket (3).
- Install the BPMV (1) to bracket retaining bolts (4).
Tighten
Tighten the bolts to 9 N·m (80 lb in).
- Install the EHCU to the vehicle frame.
Tighten
Tighten the 3 EHCU bracket bolts to 25 N·m (18 lb ft).
- 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.
- Install the brake pipes to the BPMV.
Tighten
Tighten the brake pipe fittings to 30 N·m (22 lb ft).
- Bleed the brake system. Refer to
Hydraulic Brake System Bleeding
.
- Bleed the brake system. Refer to
Antilock Brake System Automated Bleed Procedure
.
Brake Pressure Modulator Valve Replacement w/o JL4
Removal Procedure
Caution: Refer to Brake Fluid Irritant Caution in the Preface section.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.
Important: The area around the electric hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of disassembled ABS components.
- Thoroughly wash all contaminants from around the EHCU.
- For cutaway vehicles, remove the splash shield.
- For AWD vehicles, remove the torsion bar. Refer to
Torsion Bar and Support Assembly Replacement
.
- Disconnect the electrical harness connectors from the electronic brake control module (EBCM).
Important: Make sure that brake lines are tagged and kept in order for proper reassembly.
- Disconnect the brake lines from the brake pressure modulator valve (BPMV).
- Remove the bolts securing the EHCU mounting bracket to the frame rail.
- Remove the EHCU from the vehicle.
- Remove the bolts (4) securing the BPMV (1) to the EHCU mounting bracket (3) .
- Disconnect the 2-way ABS pump motor connector.
Important: Do not reuse the EBCM mounting bolts. Always install new bolts.
- Remove the bolts from the EBCM (2).
Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.
- Remove the EBCM (2) from the BPMV (1). Removal may require a light amount of force.
- 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.
- Install the EBCM (2) onto BPMV (1).
Notice: Refer to Fastener Notice in the Preface section.
Important: Do not reuse the old mounting bolts. Always install new EBCM bolts with the new BPMV.
- Install the EBCM bolts.
Tighten
Tighten the bolts to 5 N·m (44 lb in) in an X-pattern.
- Connect the 2-way ABS pump motor connector to the EBCM.
- Install the BPMV (1) to EHCU bracket (3).
- Install the BPMV (1) to bracket retaining bolts (4).
Tighten
Tighten the bolts to 9 N·m (80 lb in).
- Install the EHCU to the vehicle frame.
Tighten
Tighten the 3 EHCU bracket bolts to 25 N·m (18 lb ft).
- 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.
- Install the 5 brake pipes to the BPMV.
Tighten
Tighten the brake pipe fittings to 30 N·m (22 lb ft).
- Install the torsion bar. Refer to
Torsion Bar and Support Assembly Replacement
.
- For cutaway vehicles, install the splash shield.
- Bleed the brake system. Refer to
Hydraulic Brake System Bleeding
.
- Bleed the brake system. Refer to
Antilock Brake System Automated Bleed Procedure
.