Ford f250 check trailer and tbc fault

U1900 CAN Communication Bus Fault - Receive Error ABS Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error Instrument Cluster REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error TBC Module REFER to Section 418-00 .


Your best bet , have a qualified technician diagnose it .

Communications Network Vehicle communication utilizes a high speed controller area network (HS-CAN), International Standards Organization (ISO) 9141 network and universal asynchronous receiver-transmitter (UART)-based protocol (UBP) network. Information is sent to and from individual control modules that each control specific functions. All 3 networks are connected to the data link connector (DLC). The DLC can be found under the instrument panel between the steering column and the audio unit.
The 3 module communication networks are:

• High speed (HS) CAN
• ISO 9141
• UBP

ISO 9141 is for diagnostic use only while UBP and CAN allow multiple modules to communicate, or transfer data, with each other on a common network.



Module Name Network Type Termination Module Anti-lock brake system (ABS) module HS-CAN No Electronic automatic temperature control (EATC) module (if equipped) UBP N/A Instrument cluster (gateway module) HS-CAN and UBP Yes Parking aid module (PAM) (if equipped) ISO 9141 N/A Powertrain control module (PCM) HS-CAN Yes Restraints control module (RCM) ISO 9141 N/A Trailer brake control (TBC) module (if equipped) HS-CAN No Vehicle security module (VSM) (if equipped) UBP N/A Four wheel drive (4WD) control module (if equipped) ISO 9141 N/A
ISO 9141 Network Operation
The ISO 9141 communication network is a single wire network, used for diagnostic purposes only.
The ISO 9141 communication network is used for the following modules:

• Parking aid module
• RCM
• 4WD control module

UART-Based Protocol (UBP) Communication Network
The UBP communication network is a single wire network. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
The UBP communication network is used for the following modules:

• EATC
• Instrument cluster
• Vehicle security module

HS-CAN Network Operation
The HS-CAN network uses an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
The HS-CAN is a high speed communication network used for the following modules:

• ABS module
• Instrument cluster
• PCM
• Trailer brake control module

Network Termination
The CAN network uses a network termination circuit to improve communication reliability. The network termination of the CAN bus takes place inside the termination modules by termination resistors. Termination modules are located at either end of the bus network. As network messages are broadcast, in the form of voltage signals, the network voltage signals are stabilized by the termination resistors. Each termination module has a 120 ohm resistor across the positive and negative bus connection in the termination module. With two termination modules on each network, and the 120 ohm resistors located in a parallel circuit configuration, the total network impedance, or total resistance is 60 ohms.
Network termination improves bus message reliability by:

• stabilizing bus voltage.
• eliminating electrical interference.

Gateway Module
The instrument cluster is the gateway module, translating HS-CAN to MS-CAN and vice versa. This information allows a message to be distributed throughout both networks. The instrument cluster is the only module on this vehicle that has this ability.



All you need to do is find out which module isn't communicating

Communication Network Diagnostic Trouble Codes (DTC) Index NOTE: DTC U1900 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module. DTC Description Source Action U0073 Control Module Communication Buss Off ABS module DTC U0073 indicates the module could not communicate on the network at a point in time. The fault is not currently present. CLEAR the DTC. REPEAT the network test with scan tool. U0073 Control Module Communication Buss Off Instrument cluster DTC U0073 indicates the module could not communicate on the network at a point in time. The fault is not currently present. CLEAR the DTC. REPEAT the network test with can tool. U1900 CAN Communication Bus Fault-Recieve Error ABS module For module that failed network test, GO to Symptom Chart . U1900 CAN Communication Bus Fault-Recieve Error Instrument cluster For module that failed network test, GO to Symptom Chart . U1900 CAN Communication Bus Fault-Receive Error TBC module For module that failed network test, GO to Symptom Chart . U1950 UBP Communication Bus Fault Vehicle security module For module that failed network test, GO to Symptom Chart . U2023 Fault Received From External Node Instrument cluster RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to Section 419-10 . U2226 UBP Invalid Data From Node ID $10 (PCM) Vehicle security module RETRIEVE and FOLLOW non-network DTCs from the PCM. REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. All other DTCs - - REFER to Section 419-10 .

U1900 FORD - CAN Communication Bus Fault

Read more: https://www.autocodes.com/u1900_ford.html
Possible causes
Faulty / intermittent ignition switch connections
CAN Bus wiring intermittently open/shorted to power or ground Faulty / intermittent connection at PCM
Faulty electrical connections at ABS Control Module
Faulty electrical connections at the instrument cluster
Poor connections at the trailer brake controller/trailer connector

Tech notes This is typically a false/intermittent code. It can occur if: Someone hooks up a scanner to the OBDII port while the ignition is on or while the engine is idling. A trailer brake system is installed improperly/incorrectly on a truck with ABS (anti-lock brakes).

When is the code detected? When the PCM, Brake Controller and Instrument Cluster are unable to communicate with each other at any time while the ignition switch is turned to the "Run" position, code U1900 sets in memory.

Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Amber ABS (Anti-lock Brakes) Light ON Wrench Light On

U1900 Ford Description The Anti-ock Brakes System (ABS) module, the Powertrain Control Module (PCM), and the instrument cluster communicate over the Controller Area Network (CAN) Bus. This is a high-speed bus communication system and is not fault tolerant, which means any type of intermittent/loose connection between these 3 controllers will cause communication to stop. When the PCM, ABS module and instrument cluster are unable to communicate with each other at any time while the ignition switch is turned on, code U1900 will set.

Read more: https://www.autocodes.com/u1900_ford.html

It could be a lot of thing's ,define lost power ! Engine died an the light's lit on the instrument cluster ? Does the engine spin when you turn the key to start ? Did the malfunction light come on when the engine was running ? Do the headlamps work , shine bright ? Battery good , connections good ? What year is the vehicle ? Engine Ztec ?

the tbc fault has nothing to do with it... it stands for trailer brake controller fault. as for the no start... could be many things

It may possibly store DTCs. If not.. PINPOINT TEST H: THE INSTRUMENT CLUSTER DISPLAYS "TBC FAULT"

Test Step Result / Action to Take
H1 CHECK FOR THE PRESENCE OF A TRAILER BRAKE CONTROL (TBC) MODULE AND BRAKE PRESSURE TRANSDUCER
Verify that the vehicle is equipped with a TBC module in the instrument panel and a brake pressure transducer on the master cylinder.
Is the vehicle equipped with a TBC module and a brake pressure transducer?
Yes
GO to H2.

No
If the vehicle has a brake pressure transducer but not a TBC module, INSTALL a TBC module. CLEAR the DTCs. REPEAT the self-test.

- If the vehicle has a TBC module but does not have a brake pressure transducer, GO to H4 .

- If the vehicle has neither a TBC module nor a brake pressure transducer, GO to H3 .

H2 CHECK TBC MODULE COMMUNICATIONS
Using the scan tool, access the TBC module. Does the scan tool communicate with the TBC module?
Yes
VERIFY that the instrument cluster is configured correctly, RECONFIGURE as necessary. REFER to Programmable Parameters in this section.

No
Go To Pinpoint Test a.

H3 CHECK THE VEHICLE BUILD INFORMATION
Verify that the vehicle is supposed to be equipped with a TBC module.

Is the vehicle supposed to be equipped with a TBC module?
Yes
INSTALL a trailer brake retrofit kit. CLEAR the DTCs. REPEAT the self-test.

No
VERIFY that the instrument cluster is configured correctly, RECONFIGURE as necessary. REFER to Programmable Parameters in this section.

H4 CHECK THE VEHICLE BUILD INFORMATION
Verify that the vehicle is supposed to be equipped with a TBC module.
Is the vehicle supposed to be equipped with a TBC module?
Yes
INSTALL a brake pressure transducer. Make sure to LUBRICATE the O-ring seal with clean, specified brake fluid before installation. RECONFIGURE the instrument cluster for trailer brakes, REFER to Programmable Parameters in this section. CLEAR the DTCs. REPEAT the self-test.

No
REMOVE the TBC module and install the storage bin.

Hope this helps; keep us updated.

TBC means Trailer Brake Controller fault.Check for moisture/water in the trailer plug connector at the back of your truck. Water/moisture will cause TBC error codes. Look for moisture at all connections to the plug and inside the plug.Trailer brake controller that is built into your dash. If you are hooked up to a trailer it could mean you are losing your connection or ground to the trailer. If you are not connected to a trailer it means there is a problem with your brake controller possibly a short in the wiring caising the fault code. ----- It means either A) you have a bad ground on your trailer. Or B) your cable on your trailer is too short and causing it to pull out of the plug or C) you have a short in the factory trailer harness wiring or the plug is gunked up. --------- get this possibilities checked.It will help.Thanks.Helpmech.

the connector is wet dry it out then push plug back into the plug in to solve problem.

That is your trailer brake controller that is built into your dash. If you are hooked up to a trailer it could mean you are losing your connection or ground to the trailer. If you are not connected to a trailer it means there is a problem with your brake controller possibly a short in the wiring caising the fault code.

TBC is trailer brake control. If it says there is a fault then i would say you have one of two issues. Either the controller is faulty or you have wires grounding out to the brake control wire going to the rear of the truck for your plug.

check the rear plug on the bumper they are prone to water damage and corrosion, if you unplug the 7-way and four way plug from the body connector and test drive the vehicle this will tell you if the plug is the source of the problem.