Brake Pressure Modulator Valve Replacement
REMOVAL PROCEDURE1. Negative Battery Cable.
CAUTION: Before removing or installing any electrical unit or when a tool or equipment could easily come in contact with "live" exposed electrical terminals, disconnect the negative battery cable to help prevent personal injury and/or damage to the vehicle or components. Unless instructed otherwise, the ignition switch must be in the "OFF" or "LOCK" position.
2. Raise the vehicle.
3. Remove two 13 mm weld/stud nuts fastening the shield and the Brake Pressure Modulator Valve (BPMV) to the Electro-Hydraulic Control Module (EHCU) mounting bracket.
4. Disconnect the four electrical connectors from the Electronic Brake Control Module (EBCM).
5. Remove the electrical connector (10) from the combination valve (12).
6. Remove the front and rear brake pipes from the combination valve.
7. Remove three hydraulic lines from the tube adapters (6) on the BPMV (4).
8. Remove the EHCU from the vehicle.
9. Remove the four T-25 Torx screws (1) that fasten the EBCM (2) to the BPMV (4).
10. Remove the EBCM from the BPMV.
Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.
11. Check gasket (3) for wear or damage. Replace if worn or damaged.
12. Remove three Allen bolts (11) from the combination valve.
13. Remove the combination (12) valve from the BPMV (4).
14. Remove two transfer tubes (13).
Important: Do not reuse the transfer tubes. Always install new transfer tubes.
15. Remove three 13mm bolts (9) retaining the BPMV to the base bracket (7).
INSTALLATION PROCEDURE
1. Install new transfer tubes (13) into the combination valve (12) until fully seated.
2. Install combination valve (12) to the BPMV (4).
3. Install three Allen bolts (11) that fasten the combination valve to the BPMV.
Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.
4. Install EBCM gasket (3) to the BPMV.
5. Install EBCM to the BPMV.
6. Ensure that the new EBCM gasket (3) is aligned correctly.
NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.
7. Install four new T-25 Torx screws (1) in the EBCM.
^ Tighten the four T-25 Torx screws to 5 Nm (39 inch lbs.) in an X-pattern.
8. Install three 13mm EHCU to base bracket retaining bolts (9).
^ Tighten three 13mm bolts to 9 Nm (7 ft. lbs.).
9. Install EHCU to the vehicle.
10. Install front and rear brake pipes to the combination valve.
^ Tighten brake pipe fitting to 24 Nm (18 ft. lbs.).
11. Install three hydraulic lines to the tube adapters (6) on the BPMV.
^ Tighten the three hydraulic lines to 30 Nm (22 ft. lbs.).
12. Connect the 2 way electrical connector (10) the combination valve.
13. Connect four electrical connectors to the EBCM.
14. Install two 13mm weld/stud nuts fastening the shield and the BPMV to the EHCU mounting bracket.
^ Tighten two 13mm weld/stud nuts to 24 Nm (18 ft. lbs.).
15. Lower the vehicle.
16. Connect the negative battery cable.
17. Bleed the system.
Important: Verify that the combination valve metering rod is not depressed during bleeding.
18. Revise the tire calibration using the Scan Tool.
19. Return to Diagnostic System Check