Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Hydraulic Control Unit (HCU)

















Removal and Installation

WARNING: Do not use any fluid other than clean brake fluid meeting manufacturer's specification. Additionally, do not use brake fluid that has been previously drained. Following these instructions will help prevent system contamination, brake component damage and the risk of serious personal injury.

WARNING: Carefully read cautionary information on product label. For EMERGENCY MEDICAL INFORMATION seek medical advice. For additional information, consult the product Material Safety Data Sheet (MSDS) if available. Failure to follow these instructions may result in serious personal injury.

NOTICE: Do not spill brake fluid on painted or plastic surfaces or damage to the surface may occur. If brake fluid is spilled onto a painted or plastic surface, immediately wash the surface with water.

1. Remove the Air Cleaner (ACL) outlet tube and the ACL assembly.

2. Remove the battery and battery tray.

3. Disconnect the ABS module electrical connector.

4. Disconnect the 6 brake tube fittings.
- To install, tighten the brake master cylinder tube fittings to 27 Nm (20 lb-ft).

- To install, tighten the remaining brake tube fittings to 22 Nm (16 lb-ft).

5. Remove the 3 Hydraulic Control Unit (HCU) bracket-to-frame bolts and the HCU.
- To install, tighten to 25 Nm (18 lb-ft).

6. Remove the 3 HCU bracket-to-HCU bolts and separate the HCU from the bracket.
- To install, tighten to 15 Nm (133 lb-in).

7. NOTE: Make sure the HCU and ABS module are clean and free of any brake fluid or foreign material before separating the components.

To install, reverse the removal procedure.
- Bleed the brake system.

- Carry out the IVD Initialization sequence. Follow the scan tool directions.