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Network Message Chart

PSCM Network Input Messages 

Broadcast Message Originating Module Message Purpose
Active park assist request PAM This message is first sent to the GWM and then to the PSCM. Commands the EPAS gear during parking aid maneuvers.
ABS active ABS module Confirms the operational state of the ABS.
Battery voltage BCM This message is first sent to the GWM and then to the PSCM. Provides the PSCM with the 12-volt battery and charging system voltage.
Brake pedal position ABS module (electric brake booster) Informs the PSCM of the current brake pedal position; pressed or released. This information is used for active park assist and hill start operation.
Brake pedal position PCM (vacuum brake booster) Informs the PSCM of the current brake pedal position; pressed or released. This information is used for active park assist and hill start operation.
Drive wheel torque PCM Informs the PSCM of the current torque output available at the driven wheels. This information is used for active park assist operation.
Ignition status BCM This message is first sent to the GWM and then to the PSCM. Confirms the ignition status of the vehicle.
Lane centering information IPMA This message is first sent to the GWM and then to the PSCM. Provides the PSCM with the necessary information for lane centering. Such as driver hands off the wheel, lane centering system status,
Lane keeping aid information IPMA This message is first sent to the GWM and then to the PSCM. Provides the PSCM with necessary lake keeping information such as system status, if intervention is required for the lane keeping aid feature, how much assist is needed, or if driver override is occurring or needed.
Odometer master value IPC This message is first sent to the GWM and then to the PSCM. Informs the PSCM of the current odometer millage. The PSCM uses the odometer information for various self diagnostics.
Reverse gear selected PCM Informs the PSCM the transmission is currently in REVERSE gear. This information is used for active park assist operation.
Selectable drive mode ABS module Informs the PSCM of the current chassis drive mode request.
Stability control brake active ABS module Confirms the operational state of the stability control system.
Steering angle offset ABS module The ABS module calculates steering angle based on wheel speed sensor information and sends this information to the PSCM. The PSCM uses this information to verify other steering wheel angle information.
Steering angle request PAM This message is first sent to the GWM and then to the PSCM. Commands the EPAS gear during active park assist maneuvers.
Steering wheel position ABS module Verifies the validity of the steering angle sensor.
Trailer backup assist disable request APIM This message is first sent to the GWM and then to the PSCM. Disables the PSCM for PTBA operation for the trailer chosen by the driver.
Trailer backup assist enabled request APIM This message is first sent to the GWM and then to the PSCM. Enables the PSCM for PTBA operation for the trailer chosen by the driver.
Trailer backup assist switch request TRM This message is first sent to the GWM and then to the PSCM. Provides the current PTBA control knob position and button status; pressed, not pressed.
Trailer connection TRM This message is first sent to the GWM and then to the PSCM. Informs the PSCM a trailer is connected to the vehicle.
Trailer data IPMA This message is first sent to the GWM and then to the PSCM. Provides the trailer data for the current active trailer. Includes the trailer identification and all the stored trailer measurements.
Trailer lamp connection TRM This message is first sent to the GWM and then to the PSCM. Informs the PSCM trailer lamps (tail lights, turn signals and side markers) are connected to the vehicle.
Trailer yaw rate RCM Used by the PSCM for steering assist calculations.
Transmission gear lever position PCM Informs the PSCM of the current driver selected transmission gear.
Turn signal status SCCM module This message is first sent to the GWM and then to the PSCM. Informs the PSCM of the current, driver selected turn signal switch status; off, left, or right. This message is used for lane keeping system function.
Vehicle configuration information BCM This message is first sent to the GWM and then to the PSCM. Used to compare the PSCM configuration against the vehicles specific configuration (central car configuration).
Vehicle lateral acceleration ABS module Used by the PSCM for steering assist calculations.
Vehicle longitudinal acceleration ABS module Used by the PSCM for steering assist calculations.
Vehicle speed data ABS module Used to determine the level of assist supplied to the steering gear and to validate the steering wheel component angle by comparing the rotational speeds of each wheel. The difference in the speed of each wheel is used to derive a steering angle for comparison against the EPAS motor position sensor.
Vehicle yaw rate ABS module Used by the PSCM for steering assist calculations.
Vehicle yaw rate RCM Used by the PSCM for steering assist calculations.
Wheel speed sensor information ABS module Provides the PSCM with wheel speed sensor information such as number of rotations, rotation speed and direction of rotation. Used by the PSCM for steering assist calculations, trailer back up assist and active park assist.
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