Description And Operation: Overview
The Anti-lock Brake System (ABS) and Dynamic Stability Control (DSC) system features a Bosch ESP® 9 modulator, which is an integrated four-channel Hydraulic Control Unit (HCU) and Anti-lock Brake System (ABS) control module. The unit is located in the rear of the engine compartment on the passenger side, and it is installed in the brake hydraulic circuit between the brake master cylinder and the four brake calipers.
The ABS control module is connected to the High Speed (HS) Controller Area Network (CAN) powertrain and chassis system buses, and actively interacts with other vehicle system control modules and associated sensors to receive and transmit current vehicle operating information.
When required, the ABS control module will actively intervene and operate the HCU during braking or vehicle maneuvers to correct the vehicle attitude, stability, traction or speed. During incidents of vehicle correction, the ABS control module may also request the Engine Control Module (ECM) to control engine power in order to further stabilize and correct the vehicle.
To provide full system functionality, the ABS and DSC system comprises the following components:
- Integrated ABS control module and HCU
- Four wheel speed sensors
- Steering Angle Sensor Module (SASM), located on the steering column, behind the Clockspring (CLKSPG)
- Yaw rate and lateral acceleration sensor, located in the Restraints Control Module (RCM)
- Brake pedal switch
- DSC switch
- Warning indicators, located in the Instrument Cluster (IC).
The ABS control module provides the following brake functions that are designed to assist the vehicle or aid the driver:
- ABS
- Dynamic Stability Control (DSC), including TracDSC
- Corner Brake Control (CBC)
- Electronic Brake Force Distribution (EBD)
- Electronic Traction Control (ETC)
- Emergency Brake Assist (EBA)
- Engine Drag-torque Control (EDC)
- Understeer control
All the brake functions listed are automatically active when the ignition is on and the engine is running. The DSC system can be selected to off using the DSC switch.