Universal Asynchronous Receiver-Transmitter (UART)-Based Protocol (UBP) Communication Network

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The UBP communication network is a single circuit communications network, circuit 2077 (PK/LB). The UBP communications network does not function if the wire is shorted to ground or voltage. The UBP communication network allows intermodule communication. The UBP network operates at a maximum data transfer speed of 9.6 Kbps.

The following fault chart describes the specific HS-CAN network failures and their resulting symptom:

UBP NETWORK COMMUNICATION FAULT CHART

Failure Description	Symptom
UBP circuit open	No communication
UBP circuit short to voltage	No communication
UBP circuit short to ground	No communication
Module loss of voltage or ground	No communication
Module internal failure	No communication

The following chart describes all network messages broadcast on HS-CAN, SCP and UBP by each module, and the module(s) that receive the message:

NETWORK MODULE COMMUNICATION MESSAGE CHART

Broadcast Message	Originating Module	Network Type	Receiving Module(s)	Sets DTC Type
ABS event in progress	ABS module	HS-CAN	PCM Trailer brake control (TBC) module	Network
ABS indicator on request	ABS module	HS-CAN	Instrument cluster	Network
ABS system status	ABS module	HS-CAN	TBC module	Network
ABS VIN information	ABS module	HS-CAN	Trailer brake control module	Network
A/C clutch status	PCM	HS-CAN	Instrument cluster	Network
A/C clutch status (gateway)	Instrument cluster	UBP	Electronic automatic temperature control (EATC)	Network
Auto lamp delay status request	Instrument cluster	UBP	Vehicle security module	Network
Auto lamp delay status	Vehicle security module	UBP	Instrument cluster	Network
Auto lamp status request	Instrument cluster	UBP	Vehicle security module	Network
Auto lamp status	Vehicle security module	UBP	Instrument cluster	Network
Autolock command	Instrument cluster	UBP	Vehicle security module	Network
Autolock status request	Instrument cluster	UBP	Vehicle security module	Network
Autolock status	Vehicle security module	UBP	Instrument cluster	Network
Brake deactivator switch status	PCM	HS-CAN	ABS module Instrument cluster TBC module	Network
Brake fluid level status	Instrument cluster	HS-CAN	ABS module	Network
Brake malfunction indicator request	ABS module	HS-CAN	Instrument cluster	Network
Brake switch status	PCM	HS-CAN	ABS module Instrument cluster TBC module	Network
Brake switch status (gateway)	Instrument cluster	UBP	Vehicle security module	Network
Catalyst protection active	PCM	HS-CAN	ABS module	Network
Door ajar status request	Instrument cluster	UBP	Vehicle security module	Network
Door ajar status	Vehicle security module	UBP	Instrument cluster	Network
Electronic brake distribution status	ABS module	HS-CAN	TBC module	Network
Engine coolant temperature	PCM	HS-CAN	ABS module Instrument cluster	Network
Engine coolant temperature (gateway)	Instrument cluster	UBP	EATC	Network
Engine malfunction indicator lamp (MIL) request	PCM	HS-CAN	ABS module Instrument cluster	Network
Engine RPM	PCM	HS-CAN	ABS module Instrument cluster	Network
Engine type configuration	PCM	HS-CAN	ABS module Instrument cluster	Network
Engine type configuration (gateway)	Instrument cluster	UBP	EATC	Network
Fail-safe cooling mode status	PCM	HS-CAN	Instrument cluster	Network
Fail-safe powertrain (limp) status	PCM	HS-CAN	Instrument cluster	Network
Fuel cap off indicator request	PCM	HS-CAN	Instrument cluster	Network
Fuel flow data	PCM	HS-CAN	Instrument cluster	Network
Fuel level sender 1 instantaneous	Instrument cluster	HS-CAN	PCM	Powertrain
Fuel level sender 2 instantaneous	Instrument cluster	HS-CAN	PCM	Powertrain
Ignition switch position	Instrument cluster	HS-CAN	ABS module TBC module	Network
Ignition switch position request	Vehicle security module	UBP	Instrument cluster	Network
Ignition switch position	Instrument cluster	UBP	Vehicle security module	Network
Illumination dimmer level	Instrument cluster	HS-CAN	TBC module	Network
Keyless entry input status	Vehicle security module	UBP	Instrument cluster	Network
Key-in-ignition status request	Vehicle security module	UBP	Instrument cluster	Network
Key-in-ignition status	Instrument cluster	UBP	Vehicle security module	Network
Odometer count	PCM	HS-CAN	Instrument cluster	Network
Park brake status	Instrument cluster	HS-CAN	ABS module PCM	Network
Speed control indicator status	PCM	HS-CAN	Instrument cluster	Network
Tow-haul indicator status	PCM	HS-CAN	Instrument cluster	Network
Traction control disable switch status	Instrument cluster	HS-CAN	ABS module	Network
Trailer brake active	TBC module	HS-CAN	ABS module Instrument cluster PCM	Network
TBC module fault	TBC module	HS-CAN	Instrument cluster	Network
Trailer disconnected message	TBC module	HS-CAN	Instrument cluster	Network
Trailer fault	TBC module	HS-CAN	Instrument cluster	Network
Transmission gear engaged	PCM	HS-CAN	ABS module	Network
Transmission overdrive indicator status	PCM	HS-CAN	Instrument cluster	Network
Transmission selector (PRNDL) range	PCM	HS-CAN	ABS module Instrument cluster	Network
Transmission shift in progress	PCM	HS-CAN	ABS module	Network
Transmission temperature	PCM	HS-CAN	Instrument cluster	Network
Transmission warning indicator on request	PCM	HS-CAN	Instrument cluster	Network
UBP wake up command	Instrument cluster	UBP	EATC Vehicle security module	Network
Vehicle speed	PCM	HS-CAN	ABS module Instrument cluster TBC module	Network
Vehicle speed (gateway)	Instrument cluster	UBP	EATC Vehicle security module	Network
VIN information	PCM	HS-CAN	ABS module TBC module	Network
Water in fuel indicator status	PCM	HS-CAN	Instrument cluster	Network
Wheel speed (LF, RF, rear)	ABS module	HS-CAN	PCM TBC module	Network
Four wheel drive (4WD) status	Instrument cluster	HS-CAN	ABS module	Network
4WD low status	Instrument cluster	HS-CAN	ABS module PCM	Network