S10/T10 Blazer 4WD V6-262 4.3L (1989)
Hydraulic Assembly: Service and Repair
Four Wheel Anti-Lock Brake System
The EHCU module is not serviceable and must be replaced as a unit.
Fig. 54 EHCU/BMPV Mounting. Astro/Safari
Refer to Fig. 57 when replacing this unit.
1.
Remove washer tank attaching bolts, then position aside.
2.
Remove EHCU electrical connectors.
3.
Disconnect module brake lines. Use caution not to get brake fluid on paint or electrical connections.
4.
Remove upper to lower bracket assembly attaching bolts.
5.
Remove EHCU module and upper bracket assembly from vehicle.
6.
Remove upper mounting bracket to EHCU module attaching bolts.
7.
Reverse procedure to install, noting the following:
a.
Torque EHCU module to bracket attaching bolts to 5 ft. lbs.
b.
Torque EHCU bracket assembly attaching bolts to 20 ft. lbs.
c.
Torque brake line fittings to 16 ft. lbs.
d.
Bleed EHCU module as outlined under MAINTENANCE PROCEDURES/BLEEDING EHCU MODULE.