ABS Module

WARNING: This page is about a different car, the 2009 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

The ABS module is an on-board diagnostic, non-repairable unit consisting of the microprocessors and the necessary circuitry for their operation and is mounted to the HCU . The ABS module monitors system operation during normal driving as well as during antilock braking.

ABS module operation is as follows:

Under normal driving conditions, the microprocessor produces short test pulses to the HCU solenoid valves that check the electrical system without any mechanical reaction.
Impending wheel lock conditions trigger signals from the ABS module that open and close the appropriate HCU solenoid valves. This results in moderate pulsations in the brake pedal.
The ABS module used in Four-Wheel Drive (4WD) application includes a G-sensor. It detects vehicle movements during a brake lockup event that is transferred to other wheels through the powertrain.
During normal braking, the brake pedal feel will be identical to a standard brake system.

Most faults that occur in the ABS module will be stored as a DTC in the keep-alive memory. The DTCs can be retrieved by following the on-board diagnostic procedures detailed in Inspection and Verification.

The ABS module cannot be configured, there are 2 separate modules, one for Rear Wheel Drive (RWD) vehicles and one for 4WD vehicles. Do not interchange ABS modules between different vehicle types.