Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description

Ambient air temperature

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current ambient air temperature. The ABS module uses this information for calculations in determining the operational status of the various stability control systems and features.

Adaptive cruise control braking cancel

CCM

This messages informs the ABS module the adaptive cruise control system no longer requires vehicle braking.

Adaptive cruise control deceleration

CCM

This message is used to request vehicle deceleration by the ABS module for the adaptive cruise control system, including how much brake force is required and if precharging of the brake system is necessary.

Battery low state of charge

BCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of a low state of charge in the vehicle 12-volt battery.

Cruise control system status

PCM

This message is sent to the GWM and then to the ABS module. The ABS module uses cruise control system status for adaptive cruise control deceleration and braking.

Brake pedal applied

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module the driver has pressed the brake pedal. This message is also used by the ABS module to check the brake pressure sensor located inside the HCU.

Clutch pedal position

PCM

This message is sent to the GWM and then to the ABS module. This message is used by the ABS module for the hill start assist feature, launch control feature and line lock feature.

Collision mitigation by braking deceleration

CCM

This message is used to request vehicle deceleration by the ABS module for the collision avoidance system, including how much brake force is required and how much precharging of the brake system is necessary.

Door ajar status

BCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current door ajar status. There is a separate message for each door. The ABS module resets the parameters used for ESC when a door is opened and closed.

Driver seat belt buckle status

RCM

The ABS module resets the parameters used for the ESC function when the driver seat belt is buckled or unbuckled.

Engine disable status

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module the engine is currently disabled or enabled due to the stop-start feature.

Engine RPM

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current engine RPM. This message is used by the ABS module for the hill start assist feature and launch control feature.

Engine torque output

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current engine torque output. This information is used for the hill start assist feature and launch control feature.

Gear lever position

PCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current transmission gear lever position. This message is used for operation of the hill start assist feature and the ESC feature. The hill start assist feature operates in forward and reverse gears but the ESC feature does not operate when the transmission is in REVERSE.

Hill start assist mode

IPC

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current, driver selected mode for the hill start assist feature; off, auto or manual.

Ignition key type

BCM

This message is sent to the GWM and then to the ABS module. This message informs the ABS module of the current ignition key type; MyKey® admin key, MyKey® restricted key, key not programmed - read failure, unknown key type or invalid key type. The ABS module uses the ignition key type for activation and deactivation of certain stability control features.