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Home >> Chrysler >> 2003 >> PT Cruiser Base, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> ICU (Integrated Control Unit) >> Installation
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ICU (Integrated Control Unit): Installation

  1. Install the ICU onto its mounting bracket.
  2. Install the 3 bolts attaching the ICU to the mounting bracket.
    3. CAUTION: Before installing the 24-way connector into the CAB, be sure the seal is properly installed in the connector.
  3. Install the 24-way connector into the socket of the CAB as follows:
    • Position the 24-way connector into the socket of the CAB and carefully push it down as far as possible.
    • When the connector is fully seated into the CAB socket, push the connector lock inward. This pulls the connector into the socket of the CAB and locks it in the installed position.
  4. Install the four brake tubes going to the brakes into their respective outlet ports on the ICU HCU. Using a crow foot on a torque wrench, tighten the four brake tube nuts to 17 N.m (145 in. lbs.).
  5. Wipe face of the power brake booster clean where the master cylinder seal comes in contact when it's installed. Do not get any cleaner or debris inside booster.
  6. Position the master cylinder on the studs of the power bake booster, aligning the push rod of the power brake booster with the master cylinder piston push rod. Carefully push the master cylinder onto the studs until it contacts the face of the booster.
  7. Install two master cylinder mounting nuts and tighten them to 18 N.m (160 in. lbs.).
    8. NOTE: When installing the brake tubes from the master cylinder on the HCU, the brake tube with the small tube nut is to be installed in the forward most port on the HCU with the small end going toward the master cylinder secondary port.
  8. Install the primary and secondary brake tubes from the master cylinder onto the HCU. Do not completely tighten the primary and secondary tubes at this time.
  9. Connect the two brake tubes to the master cylinder primary and secondary ports.
  10. Using a crow foot on a torque wrench, tighten the primary and secondary brake tube nuts at both the master cylinder and the HCU to 17 N.m (145 in. lbs.).
  11. Connect the brake fluid level switch wiring connector
  12. Install the power distribution center.
  13. Connect the negative (ground) cable on the battery.
  14. Install the air cleaner housing.
  15. Install the air cleaner cover.
  16. Hook up the DRBIII to the initialize the new CAB.
  17. Fill the master cylinder to the proper fill level and bleed the base and ABS hydraulic systems.
  18. Road test the vehicle to ensure proper operation of the base and antilock brake system.
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