Hydraulic Control Assembly - Antilock Brakes: Service and Repair

HYDRAULIC CONTROL UNIT (HCU)

Removal and Installation

All vehicles

WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with running water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately.

CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled onto a painted or plastic surface, immediately wash it with water.

1. Disconnect the battery ground cable.

Vehicles built before 3/2002






2. Disconnect the electrical connector by lifting up on the release tab.

Vehicles built after 3/2002






3. Disconnect the electrical connector by rotating the protective cover.

4. Disconnect the brake lines from the Hydraulic Control Unit (HCU).






Vehicles built before 3/2002






Vehicles built after 3/2002

All vehicles






5. Remove the HCU.
1. Remove the bolts.
2. Remove the HCU.

6. If necessary, remove the anti-lock brake control module.






7. CAUTION: After the electronic hydraulic control unit is installed, it is necessary to bleed the hydraulic brake system.

NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms can occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 mi) or more to relearn the strategy.

To install, reverse the removal procedure.
- Bleed the HCU.