Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2015 Ford Transit-350 HD Base, Van Cargo ExtendedFACTORY OEM SERVICE PROCEDURE
Auxiliary Brake System DTCS
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1317 | Battery Voltage High | GO to Pinpoint Test D |
| B1318 | Battery Voltage Low | GO to Pinpoint Test E |
| B1342 | ECU Is Faulted | REPAIR all other Diagnostic Trouble codes (DTCs) before repairing DTC B1342. INSPECT for a stuck or damaged manual sliding lever and gain control buttons. REPAIR or CLEAR any obstructions or foreign material.
NOTE:
It takes 2 minutes for the TBM to set DTC B1342 due to a stuck manual sliding lever or a stuck gain control button. CLEAR the DTC. TEST the system for normal operation. If the DTC returns, INSTALL a new TBM. Refer to: Trailer Brake Control Module (TBM) . |
| B1863 | Ground ECU Circuit Open | GO to Pinpoint Test F |
| C2806 | Trailer Brake Output Circuit Short to Vbatt | GO to Pinpoint Test C |
| C2807 | Trailer Brakes Wiring Circuit Short to Ground | GO to Pinpoint Test C |
| U0100 | Lost Communication with ECM / PCM | GO to Pinpoint Test G |
| U0121 | Lost Communication with Anti-Lock Brake System (ABS) Control Module | GO to Pinpoint Test H |
| U0140 | Lost Communication with Body Control Module (GEM) | GO to Pinpoint Test I |
| U0415 | Invalid Data Received from Anti-Lock Brake System (ABS) Control Module | GO to Pinpoint Test H |
| U2202 | Invalid Configuration Data Received | The vehicle configuration information sent from the BCM does not match what is stored in the TBM. The BCM has been incorrectly configured or has not been configured after a new installation. DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs) and TBM DTC U0140 (if present) before diagnosing this DTC. If there are no BCM Diagnostic Trouble Codes (DTCs) or TBM DTC U0140 is not present, CONFIGURE the BCM car configuration parameters. Refer to: Module Configuration - System Operation and Component Description . |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.