Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSJEEP2002LIBERTY LIMITED EDITION 2WD V6-3.7L VIN KREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - BRAKES AND TRACTION CONTROLELECTRONIC BRAKE CONTROL MODULEDESCRIPTION AND OPERATION
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN K
Electronic Brake Control Module: Description and Operation
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN KSECTION Description and Operation
CONTROLLER ANTILOCK BRAKE (CAB)
The Antilock Brake Controller (CAB) is a microprocessor-based device that monitors wheel speeds and controls the antilock functions.
The primary functions of the CAB are:
- monitor wheel speeds
- detect wheel locking tendencies
- control fluid pressure modulations to the brakes during antilock stop operation
- control the ABS warning indicator
- monitor the system for proper operation
- provide communication to the DRB III while in diagnostic mode
- store diagnostic information in non-volatile memory
The CAB continuously monitors the wheel speed sensors. When a wheel locking tendency is detected, the CAB will command the appropriate HCU valve to modulate brake fluid pressure to that wheel. Brake pedal position is maintained during an antilock stop by being a closed system with the use of 3 accumulators. The CAB continues to control pressure in individual hydraulic circuits until a wheel locking tendency is no longer present. The CAB turns on the pump/motor during an antilock stop.
The antilock brake system is constantly monitored by the CAB for the proper operation. If the CAB detects a system malfunction, it can disable the antilock system and activate the ABS warning indicator. If the antilock function is disabled, the system will revert to standard base brake system operation.
The CAB inputs include the following:
- three wheel speed sensors
- brake lamp switch
- ignition switch
- battery voltage
- diagnostic communication (PCI BUS)
- G-sensor (internal acceleration sensor)
The CAB outputs include the following:
- six valve/solenoid drivers
- pump/motor actuation
- ABS warning indicator actuation
- diagnostic communication (PCI BUS)
The Antilock Brake Controller (CAB) is a microprocessor-based device that monitors wheel speeds and controls the antilock functions.
The primary functions of the CAB are:
- monitor wheel speeds
- detect wheel locking tendencies
- control fluid pressure modulations to the brakes during antilock stop operation
- control the ABS warning indicator
- monitor the system for proper operation
- provide communication to the DRB III while in diagnostic mode
- store diagnostic information in non-volatile memory
The CAB continuously monitors the wheel speed sensors. When a wheel locking tendency is detected, the CAB will command the appropriate HCU valve to modulate brake fluid pressure to that wheel. Brake pedal position is maintained during an antilock stop by being a closed system with the use of 3 accumulators. The CAB continues to control pressure in individual hydraulic circuits until a wheel locking tendency is no longer present. The CAB turns on the pump/motor during an antilock stop.
The antilock brake system is constantly monitored by the CAB for the proper operation. If the CAB detects a system malfunction, it can disable the antilock system and activate the ABS warning indicator. If the antilock function is disabled, the system will revert to standard base brake system operation.
The CAB inputs include the following:
- three wheel speed sensors
- brake lamp switch
- ignition switch
- battery voltage
- diagnostic communication (PCI BUS)
- G-sensor (internal acceleration sensor)
The CAB outputs include the following:
- six valve/solenoid drivers
- pump/motor actuation
- ABS warning indicator actuation
- diagnostic communication (PCI BUS)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.