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Home >> Lincoln >> 2019 >> Navigator L Select, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Parking Aid System - Vehicles With: Trailer Back Up Assist (TBA) >> Description And Operation >> Parking Aid - System Operation and Component Description >> System Operation >> Network Message Chart
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Network Message Chart

PSCM Network Input Messages 

Broadcast Message Originating Module Message Purpose
Gear lever position TCM Used for PTBA feature activation and video display.
Ignition status BCM Used to ensure the ignition state is appropriate for PTBA operation.
Trailer backup assist cancel request APIM Used to provide a cancel request from the APIM if it cannot support the PSCM display request.
Trailer backup assist enabled request IPC Used to enable the PSCM for PTBA operation for the trailer chosen by the user.
Trailer backup assist setup request IPC Request to setup up a new trailer.
Trailer backup assist status IPMB Used to provide the status of the PTBA system.
Trailer backup assist switch request TRM Used to provide the current PTBA control knob position and button status (pressed/not pressed).
Trailer ball to bumper distance IPC Indicates how far from the trailer ball is from the bumper.
Trailer setup IPMB Request to setup up a new trailer.
Trailer target to bumper distance IPC Indicates the target distance for the ball to bumper.
Vehicle speed PCM Used as an input to the PTBA controller in the PSCM.

IPMB Network Input Messages 

Broadcast Message Originating Module Message Purpose
Message center display IPC Indicates what is displayed in the message center.
Message center feature configuration IPC Indicates the message center configuration.
Rear differential indicator request TCCM Used to indicate if there is a fault with the rear differential.
Rear differential lock indicator request TCCM Used to indicate if the rear differential has been locked.
Remote start status BCM Used to indicate if the vehicle is under remote start protocol.
Trailer angle offset direction status IPC Used to provide the trailer data for the current active trailer. Includes the trailer ID and all the trailer measurements stored in the IPC.
Trailer backup assist cancel request APIM Used to provide a cancel request from the APIM if it cannot support the PSCM display request.
Trailer backup assist enabled PSCM Used to request trailer angle detection in the IPMB.
Trailer backup assist enabled request IPC Request to setup up a new trailer.
Trailer backup assist setup status IPC Indicates the status of the trailer back up setup.
Trailer backup assist setup request IPC Request to setup up a new trailer.
Trailer backup assist text message request PSCM Used to provide PTBA center stack infotainment display status to the IPMB.
Trailer ball to bumper distance IPC Indicates how far from the trailer ball is from the bumper.
Trailer lamp connected TRM Deactivates the system if a trailer is connected.
Trailer target to bumper distance IPC Indicates the target distance for the ball to bumper.
Vehicle lateral acceleration RCM Used to determine the current vehicle lateral acceleration.
Wheel speed data ABS module Used to confirm vehicle movement and calculate distance traveled during PTBA maneuvers.
Vehicle yaw rate RCM Used to determine the current vehicle yaw rate.

IPC Network Input Messages 

Broadcast Message Originating Module Message Purpose
Gear lever position PCM Input used for the park requirement for trailer set up in the message center.
Steering wheel message center switch status SCCM Used for the message center navigation and trailer setup.
Trailer backup assist text message request PSCM Used to provide the trailer information message displays in the message center.
Trailer reverse message request IPMB Used to generate messages on the center stack infotainment display.
Trailer setup IPMB Request to setup up a new trailer.
Trailer backup assist setup status APIM Indicates the status of the trailer back up setup.

TRM Network Input Messages 

Broadcast Message Originating Module Message Purpose
Trailer backup assist text message PSCM Used to illuminate the status indicator in the PTBA control knob button when system is on.

BCM Network Input Messages 

Broadcast Message Originating Module Message Purpose
Trailer assist lamp request PSCM Used to command the trailer assist lamp on and off for low ambient light operation.

PCM Module Network Input Messages 

Broadcast Message Originating Module Message Purpose
Trailer backup assist enabled PSCM Used to limit the vehicle speed and throttle response when PTBA is in use.

APIM Network Input Messages 

Broadcast Message Originating Module Message Purpose
Trailer backup assist text message request PSCM Used to generate messages on the center stack infotainment display.
Trailer reverse message request IPMB Used to generate messages on the center stack infotainment display.