Anti-Lock Brake System (ABS) Module

The Anti-Lock Brake System (ABS) module is attached directly to the Hydraulic Control Unit (HCU) and is the Electronic Control Unit (ECU) for all of the vehicle dynamic systems. The module monitors all sensor inputs and all High Speed Controller Area Network (HS-CAN) messages that relate to vehicle dynamics and then directly controls the solenoid valves and the hydraulic pump motor.

On vehicles equipped with adaptive cruise control, the Anti-Lock Brake System (ABS) module and Hydraulic Control Unit (HCU) are serviced as an assembly. When a new Anti-Lock Brake System (ABS) module is installed, whether with a new Hydraulic Control Unit (HCU) or not, the module must be programmed with the vehicle information. For additional information on module programming, REFER to PROGRAMMABLE MODULE INSTALLATION (PMI) .

When a vehicle dynamic system fault has been corrected or a component has been replaced, the Anti-Lock Brake System (ABS) module requires calibration. The calibration procedure is required for the stability control sensors to learn the "zeroposition" of the vehicle which means the vehicle must be on a level surface and must not be moving. The calibration procedure is carried out using a scan tool.