Hydraulic Control unit (HCU) - Installation

INSTALLATION






CAUTION: When installing the ABS module to the HCU, be sure to properly align the ABS module and the HCU so that sensor terminals or the contact pads do not touch other parts of the modules. Otherwise, damage to the pressure sensor or Pump Motor connection may result requiring HCU replacement.

NOTE: If replacing the Integrated Control Unit (ICU) steps 1 and 2 may not be necessary.

1. If necessary, align the ABS module contact tower (3) and the tower receiving hole (2) of the Hydraulic Control Unit (1) and put ABS module (4) and the HCU (1) together without touching the tower terminals to any solenoids.






NOTE: Tighten the ABS module screws (2) in a crisscross pattern.

2. If necessary, install the four ABS module screws (2) securing the module (1) to the HCU and tighten to 2.9 Nm (25.5 in. lbs.).





3. Install the ICU (1) to the vehicle by firmly pushing the assembly onto the push mount pins.
4. Install the chassis lines (4) at the HCU (1).
5. Install the primary and secondary brake lines (2) to the HCU (1) and tighten to 19 Nm (168 in. lbs.).
6. Reconnect the HCU (1) electrical connector (3).
7. Install negative battery cable to the battery.
8. Install the air cleaner body.
9. Remove the brake pedal prop rod.
10. Pressure bleed the base brake system Service and Repair.
11. Bleed the ABS system Service and Repair.
12. If the ABS module was replaced, connect the scan tool and initialize the ABS module by performing the ABS VERIFICATION TEST ABS Verification Test.
13. Verify proper brake operation.