Electric Park Brake Control Module

The Anti-lock Brake System (ABS) control module controls the two Electric Park Brake (EPB) actuators separately. A tilt sensor and a gravity sensor are integrated into the Restraints Control Module (RCM). The RCM communicates with ABS module on the High Speed (HS) Controller Area Network (CAN) chassis systems Bus. The tilt sensor allows the ABS control module to determine the longitudinal attitude of the vehicle. The gravity sensor allows the ABS control module to monitor the vehicle's deceleration.

Four hardwired connections with the EPB switch give the ABS control module the EPB apply and EPB release inputs. The EPB is integrated into ABS control module so the wheel speed sensors are also hard wired. Inputs from other components are received on the HS CAN as follows:

• Accelerator Pedal Position (APP) sensor, from the Powertrain Control Module (PCM).
• Stop lamp switch, from the PCM.
• Clutch pedal position sensor, from the PCM.
• Reverse gear switch, from the Body Control Module/Gateway Control Module (BCM/GWM) (manual transmission vehicles only).
• Gear position, from the Transmission Control Module (TCM) (automatic transmission vehicles only).
• First gear switch, from the PCM (manual transmission vehicles only).

In addition to the hardwired outputs to the EPB actuators, the ABS control module outputs status and fault signals on the HS CAN operate the warning indicators and they advise other systems if there is a fault with the EPB system.