Abs - Electrical Testing: Description: General

The ABS is a full time, four channel system that gives individual speed control to all four wheels to provide the vehicle with anti-lock braking (ABS), Electronic Traction Control (ETC), and Hill Descent Control (HDC). The systems are controlled by the ABS ECU, which is mounted on the rear of the ABS modulator. The ABS ECU also controls the front to rear brake balance by Electronic Braking force Distribution (EBD). This maximizes vehicle stability under braking.

For a detailed description of ABS, ETC HDC, and EBD, refer to CONTROL UNITS - DESCRIPTION & OPERATION of the System Description and Operation Workshop manual.

The ABS modulator uses the CAN-BUS to communicate with other ECU's to enable it to control braking more efficiently. For more information on the CAN-BUS, refer to COMMUNICATION DATA BUSES - DESCRIPTION & OPERATION of the System Description and Operation Workshop manual.