Integrated Control Unit (ICU) - Removal

REMOVAL

1. Disconnect negative (-) battery cable from battery post and isolate.




2. Using a brake pedal holding tool as shown, depress brake pedal past its first inch of travel and hold it in this position. Holding pedal in this position will isolate master cylinder from hydraulic brake system and will not allow brake fluid to drain out of brake fluid reservoir while brake lines are open.




3. Disconnect primary (4) and secondary (3) brake tubes coming from master cylinder (1) at ABS ICU (2). Cap off brake tubes and install sealing plugs in open brake tube outlet ports of ICU.




4. Disconnect four Chassis brake tubes (1, 2, 3, 4) at ABS ICU (5). Cap off brake tubes and install sealing plugs in open brake tube outlet ports of ICU.




NOTE: To disconnect the ABM wiring connector in the following step, depress the tab (1) in the center of the connector and lift the release lever (2), rotating it upward to the top of the connector, or until the connector is fully released from the module socket.





5. Disconnect wiring connector from ABM.




6. Loosen two bolts (1) fastening ABS ICU (2) bracket to frame rail.
7. Lift ICU off frame rail bolts and remove from vehicle.
8. If ABM and HCU need to be separated, Disassembly