This vehicle is equipped with the Bosch 5.3 antilock braking system, consisting of the following braking systems:
Antilock Brake System (ABS)
Dynamic Rear Proportioning (DRP)
Traction Control System (TCS) (with automatic transmission)
The following components are involved in the operation of the above systems:
Electronic Brake Control Module (EBCM) - The EBCM controls the system functions and detects failures.
Brake Pressure Modulator Valve (BPMV) - The BPMV contains the hydraulic valves and pump motor that are controlled electrically by the EBCM. If the vehicle is not equipped with traction control the BPMV uses a three circuit configuration with a front-rear split. Individual circuits are provided for the left front and right front wheels, and the rear wheels use one circuit. If the vehicle is equipped with traction control The BPMV uses a 4 circuit configuration with a front/rear split. The BPMV directs fluid from the reservoir of the master cylinder to the front wheels and fluid from the other reservoir to the rear wheels. The circuits are hydraulically isolated so that a leak or malfunction in one circuit will allow continued braking ability on the other.