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Integrated Control Unit - MK25E: Installation

  1. Place ICU with mounting bracket over two mounting bolts in frame rail. See Figure. Tighten bolts to 24 N.m (18 ft. lbs.) torque.
  2. With connector cover completely open. See Figure, install 47-way wiring connector into socket of the ABM and close cover, locking connector in place.
  3. Install four Chassis brake tubes into outlet ports of ICU. See Figure. Tighten brake tube nuts to 14 N.m (120 in. lbs.) torque.
    4. CAUTION: Seal on rear of master cylinder is used to create seal for holding vacuum in power brake vacuum booster. Vacuum seal on master cylinder MUST be replaced whenever master cylinder is removed from power brake vacuum booster.
  4. Remove vacuum seal located on mounting flange of master cylinder. Vacuum seal is removed from master cylinder by carefully  pulling it off rear of master cylinder. Do not attempt to pry seal off master cylinder by inserting a sharp tool between seal and master cylinder casting. 
  5. Install NEW vacuum seal on rear of master cylinder making sure seal fits squarely in mounting groove.
  6. Position master cylinder on studs of power brake booster. See Figure, aligning booster push rod with master cylinder piston.
  7. Install two master cylinder mounting nuts. See Figure. Tighten both mounting nuts to 25 N.m (225 in. lbs.) torque.
  8. Thread primary and secondary brake tubes into ICU ports as shown. See Figure. Brake tubes must be held securely when tightened to control orientation of flex section. Tighten tube nuts to 14 N.m (120 in. lbs.) torque.
  9. Connect wiring harness connector to brake fluid level switch mounted in brake fluid reservoir. See Figure.
  10. Place coolant recovery bottle in its normal mounted position and install nuts fastening it in place. (Refer to COOLING/ENGINE/COOLANT RECOVERY PRESS CONTAINER - INSTALLATION)
  11. Connect negative battery cable to battery post.
  12. Hook up scan tool to initialize ABM.
  13. Fill master cylinder with clean, fresh Mopar(R) Brake Fluid or equivalent, then bleed base brakes and ABS. (Refer to STANDARD PROCEDURE - BASE BRAKE BLEEDING )
  14. Road test vehicle to ensure proper operation of brakes.
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