Anti-Lock Brake System (ABS) Module

The ABS module is the ECU for the ABS and stability control systems. The ABS module monitors all sensor inputs and all CAN messages relating to ABS and stability control, then directly controls the solenoid valves and the hydraulic pump motor.

On vacuum brake boosted vehicles, the ABS module and HCU are a single assembly, while the vacuum booster and master cylinder are 2 separate assemblies.

On electric brake boosted vehicles, the ABS module, HCU and brake master cylinder are a single assembly called the EBB unit.

When a new ABS is installed, the module must be programmed with the current vehicle configuration information. For additional information on module programming, Refer to: Module Configuration - System Operation and Component Description .

When an ABS or stability control fault has been corrected or a new component has been installed, the ABS module must be calibrated. The ABS Calibration procedure is required for the stability control sensors to learn the zero-position of the vehicle which means the vehicle must be on a level surface and not moving. The ABS Calibration procedure is carried out using a diagnostic scan tool.