Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Electro-Hydraulic Control Unit (EHCU):

REMOVE OR DISCONNECT
1. Negative battery cable.
2. Four electrical connectors from EBCM.
3. Electrical connector from the combination valve.
4. Front and rear brake pipes from the combination valve.
5. Three hydraulic lines from the tube adapters on the BPMV.
6. Three 10mm bolts that fasten the EHCU bracket to the vehicle mounting bracket.
7. EHCU from the vehicle.
8. Four T-25 Torx(R) bolts from the EBCM.
9. EBCM from BPMV. A light amount of force may be necessary to remove the EBCM.

NOTE:
^ Do not pry on the EBCM or BPMV. Excessive force will cause damage to the EBCM.
^ Do not reuse the EBCM gasket or mounting bolts. Always install a new gasket and new bolts.

10. Three Allen bolts from the combination valve.
11. Combination valve from the BPMV.
12. Two transfer tubes.
13. Three 13 mm bolts retaining the BPMV to the bracket.

NOTE:
^ Do not reuse the transfer tubes. Always install new transfer tubes.

INSTALL OR CONNECT
1. New transfer tubes into the combination valve until fully seated.
2. Combination valve to BPMV.
3. Three Allen bolts that fasten the combination valve to the BPMV.

^ Tighten Bolts in two steps.
^ First to 8 Nm (6 ft. lbs.)
^ Second to 16 Nm (12 ft. lbs.)

4. New EBCM gasket to EBCM.

NOTE:
^ Do not use RTV or any other sealant on the gasket or mating surfaces.

5. EBCM to BPMV.

^ Inspect Gasket to verify proper alignment.

6. Four new EBCM Torx(R) bolts.

^ Tighten Four bolts to 5 Nm (39 in. lbs.) in an X pattern.

7. Three 13 mm EHCU to base bracket retaining bolt.

^ Tighten three 13mm bolts to 9 Nm (7 ft. lbs.)

8. EHCU on to the vehicle.
9. Three 10mm bolts that fasten the EHCU bracket to the vehicle bracket.
10. Front and rear brake pipes to the combination valve.

^ Tighten brake pipe fittings to 29 Nm (22 ft. lbs.)

10. Three hydraulic lines to tube adapters on BPMV.
11. The 2-way connector to combination valve.
12. Four electrical connectors to the EBCM.
13. Negative battery cable.
14. Bleed the brake system.

^ Verify that the combination valve metering rod is depressed during bleeding.

15. Return to Diagnostic System Check.