Hydraulic Assembly

REMOVAL

1. Disconnect negative battery cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

2. Disconnect 12-pin connector attaching Hydraulic Control Unit (HCU) to wire harness, and disconnect 2-pin connector attaching pump motor to harness.

3. Remove two tubes from inlet ports and three tubes from outlet ports of HCU. Plug each port to prevent brake fluid from spilling on paint and wiring.

NOTE: HCU assembly bracket contains locating hooks on top of the frame. The assembly must be lifted prior to pulling it away from the frame.

4. Remove three nuts retaining HCU assembly and remove assembly from vehicle.

INSTALLATION

CAUTION: HCU is not interchangeable with other units. Be sure to replace with correct part.

1. Insert HCU assembly into mounting bracket. Install three retaining nuts and tighten to 16-24 Nm (12-18 ft lb).

2. Connect three tubes to outlet ports on side of HCU and two tubes to inlet ports on front of HCU. Tighten tube fittings to 14-24 Nm (10-18 ft-lb).

3. Connect 12-pin connector and 8-pin connector to harness.

4. Connect positive battery cable.

5. Perform system brake bleeding procedures. Check for fluid leaks.