Network Message Chart

Module Network Input Messages: Power Steering Control Module (PSCM)

Broadcast Message	Originating Module	Message Purpose
ABS active	ABS module	Informs the PSCM an anti-lock brake event is taking place. The PSCM modifies operating parameters when an anti-lock brake event is taking place.
Battery voltage	BCM	This message is sent to the GWM and then to the PSCM. Provides the PSCM with the 12-volt battery and charging system voltage.
Driven wheel torque output	PCM	This message is sent to the GWM and then to the PSCM. 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 sent to the GWM and then to the PSCM. Used to confirm the ignition status of the vehicle.
Lateral motion control data	IPMA	Contains all the lane keeping assist information necessary for EPAS lane keeping assist operation while driving through a curve.
Lane keep assist data	IPMA	Contains all the lane departure and lane keeping assist information necessary for EPAS lane keeping assist operation.
Odometer master value	IPC	This message is first sent to the GWM and then to the PSCM. The PSCM uses the odometer information for various self diagnostics.
Outside air temperature	IPC	This message is first sent to the GWM and then to the PSCM. The PSCM uses the temperature information for various self diagnostics.
Powertrain status	PCM	This message is sent to the GWM and then to the PSCM. Used to confirm the status of the operating mode; off - torque not available, on - torque not available, start in progress - torque not available or on - torque available.
Reverse gear status	PCM	This message is sent to the GWM and then to the PSCM. Informs the PSCM of the current reverse gear status; inactive not confirmed, inactive confirmed, active not confirmed, or active confirmed. This information is used for active park assist operation.
Selectable drive mode request	ABS module	Informs the PSCM of the current chassis drive mode request.
Stability control brake active	ABS module	Informs the PSCM either an ESC or RSC event is taking place. The PSCM modifies operating parameters when a stability control event is taking place.
Steering assist data	IPMA	Contains all the collision avoidance data necessary for the evasive steering feature.
Steering angle request	IPMA	Contains the steering angle requests for lane keeping assist operation.
Steering angle request	PAM	Contains the steering angle requests for parking assist operation.
Turn signal switch status	SCCM	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 sent to the GWM and then to the PSCM. Used to compare the PSCM configuration against the vehicles specific configuration (central car configuration).
Vehicle latitudinal acceleration rate	ABS module	Used by the PSCM for steering assist calculations.
Vehicle speed	ABS module	Determines 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 direction	ABS module	Provides the PSCM with the current direction of travel for each wheel. Used by the PSCM for steering assist calculations.
Wheel speed	ABS module	Provides the PSCM with the current rotational speed of each wheel. Used by the PSCM for steering assist calculations.