General Information

Integrated Control Unit (ICU):

The Hydraulic Control Unit (HCU)used with the Teves Mark 20 ABS is different from the HCU used on previous Chrysler products with ABS. The HCU used on this A13S system is part of the Integrated Control Unit (ICU). The HCU is part of what is referred to as the ICU because the HCU and the Controller Antilock Brakes (CAB) are combined (integrated) into one unit. This differs from previous Chrysler products with ABS, where the HCU and the CAB were separate components located in different areas of the vehicle.

NOTE: The HCU and CAB used on a vehicle that is equipped with only ABS and on a vehicle that is equipped with ABS and traction control are different. The HCU on a vehicle equipped with ABS and traction control has a valve block housing that is approximately 1 inch longer on the low pressure fluid accumulators side than a HCU for a vehicle that is equipped with only ABS.

ICU Mounting Location:

The ICU is located on the passenger side of the vehicle, and is mounted to the front suspension crossmember. The ABS only ICU contains the following components for controlling the brake system hydraulic pressure during ABS braking: The CAB, eight valve solenoids, (four inlet valves and four outlet valves) fluid accumulators a pump, and an electric motor. The ABS with traction control ICU contains 10 valves and solenoids. The extra two valves and solenoids are used to isolate the brake system during traction control operation.

CAUTION: No components of the ICU are serviceable. If any component that makes up the ICU is diagnosed as not functioning properly it MUST be replaced. The replaceable components of the ICU, are the HCU and the CAB. The mounting bracket is also replaceable as a separate component of the ICU. The remaining components of the ICU are not serviceable items. No attempt should ever be made to remove or service any individual components of the HCU. This is due to the concern of contamination entering the HCU while performing a service procedure. Also no attempt should ever be made to remove or service any individual components of the CAB.

CAUTION: At no time when servicing the ICU should a 12 volt power source be applied to any electrical connector of the HCU or the CAB.