Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Hydraulic Control Unit (HCU)

Removal
All vehicles
1. Disconnect the battery ground cable.
2. Raise and support the vehicle.
3. Connect a bleed pipe bottle to the caliper bleed nipple and loosen the bleed nipple.
4. Install pedal hold-down tool.
^ Install the tool between the pedal and the seat frame.
^ Turn the tool hand-wheel to depress and hold the pedal 60 mm (2.4 inch) from the 'OFF' position
^ This will prevent loss of fluid from the reservoir through disconnected brake pipes.
5. Remove the bleed pipe and bottle.
^ Tighten the caliper bleed nipple.
^ Disconnect and remove the bleed pipe and bottle.
^ Install the bleed nipple dust cap.





6. Disconnect the hydraulic control unit electrical connector.

Vehicles with stability assist





1. Disconnect the pressure sensor electrical connector.

All vehicles





1. CAUTION: If brake fluid is spilt on the paintwork, the effected area must be immediately washed down with cold water.

Disconnect the hydraulic control unit brake tubes.





2. Remove the hydraulic control unit.

Installation





1. To install, reverse the removal procedure.
^ Tighten to 17 Nm.
2. Bleed the brake system.