Hydraulic Control unit (HCU) - Removal

REMOVAL

1. Remove and isolate the negative battery cable from the battery.
2. Install prop rod on the brake pedal to keep pressure on the brake system. Holding the pedal in this position will isolate the master cylinder from the hydraulic brake system and will not allow brake fluid to drain out of the brake fluid reservoir while the brake lines are open. This will allow you to bleed out the area of repair instead of the entire system.
3. Siphon the master cylinder reservoir.
4. Remove the air cleaner body.






NOTE: Mark the brake lines locations before removing to assist in proper installation.

5. Remove the primary and secondary brake tubes (2) at the Hydraulic Control Unit (HCU) (1).
6. Remove the chassis lines (4) at the HCU (1).
7. Disconnect the Antilock Brake System (ABS) module electrical connector (3).
8. Remove the Integrated Control Unit (ICU) (1) with the bracket (5) from the vehicle by firmly lifting the assembly from the push mount pins.






CAUTION: When removing the ABS module from the HCU, be sure to completely separate the two components approximately 38 mm (1.5 in.) straight out before moving module to the side. Otherwise, damage to the pressure sensor or Pump Motor connection may result requiring HCU replacement. Do not to touch the sensor terminals on the module side or the contact pads on the HCU side as this may result in contamination and issues in the future.

NOTE: If replacing the ICU (HCU and ABS module together) then step 9 is not necessary.

9. If necessary, remove the four ABS module screws (2) securing the module (1) to the HCU and firmly pull straight apart.
10. Remove and transfer the bracket as necessary.