Index Chrysler Chrysler TOWN & COUNTRY, VOYAGER, Dodge Caravan - service repair manual 2001-2007 year
|
|
3.3 SYSTEM COMPONENTS ABS • controller antilock brake (CAB) • vacuum booster • master cylinder • ABS integrated electronic control module/ hydraulic control unit (HCU), valve block assem- • 4 wheel speed sensor/tone wheel assemblies • ABS warning indicator • fuses and wiring harness • fluid reservoir ABS With Traction Control • CAB with Traction Control programming • HCU with two additional control valves. • TRAC ON/OFF Switch • TRAC/TRAC OFF indicators 3.3.1 ABS AND BRAKE WARNING The amber ABS warning indicator is located in the instrument cluster. It is used to inform the The ABS Warning Indicator will remain lit during every key cycle until a circuit or component fault is The Instrument Cluster will illuminate the ABS Warning Indicator if it loses communication with The red BRAKE warning indicator is also located in the instrument cluster. It can be activated in 3.3.2 CONTROLLER ANTILOCK BRAKE The Controller Antilock Brake (CAB) is a microprocessor-based device that monitors wheel process the information. The results are then com- The primary functions of the CAB are to: • detect wheel locking tendencies • control fluid pressure modulation to the brakes • monitor the system for proper operation • manage traction control functions • provide communication to the DRBIII t while in diagnostic mode • store diagnostic information in non-volatile mem- The CAB continuously monitors the speed of each wheel. When a wheel locking tendency is detected, The antilock brake system is constantly moni- tored by the CAB for proper operation. If the CAB • diagnostic communication • four wheel speed sensors • three power feeds: valve, pump, and microproces- • brake switch • traction control switch The CAB outputs include the following: • ABS warning indicator actuation • 12 volts power to wheel speed sensors • eight valves • ten valves with traction control • diagnostic communication • PCI bus communication • traction control lamp illumination 3.3.3 HYDRAULIC CONTROL UNIT The hydraulic control unit (HCU) contains the valve block assembly, and pump/motor assembly. Valve Block Assembly: The valve block assem- bly contains valves with four inlet valves and four 2 GENERAL INFORMATION |