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.
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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 585 (MULTIFUNCTION ELECTRONIC MODULES)DIAGNOSIS AND TESTINGBODY CONTROL MODULE (BCM)PINPOINT TESTSPINPOINT TEST U: U1A4C:55
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Pinpoint Test U: U1A4C:55
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Pinpoint Test U: U1A4C:55
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
REFER to: Module Controlled Functions - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM U1A4C:55 Build / End of Line mode Active: Not Configured This DTC sets when the BCM is set in factory mode. Possible Sources
- BCM programing
- BCM
- U1 CONFIRM THE DTC (DIAGNOSTIC TROUBLE CODE) RESETS
- Make sure the vehicle is stationary and the BCM entry level requirements are met prior to performing the self-test.
- Ignition ON.
- Connect the diagnostic tool.
- Using the diagnostic scan tool, clear the DTC.
- Wait 10 seconds.
- Using the diagnostic scan tool, perform the BCM self-test.
Is DTC U1A4C:55 still present?
Yes REFER to: Factory Mode Deactivation . No The system is operating correctly at this time. The DTC may have been falsely set by the BCM.
RENDER: 1.0x
NO RELATED
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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.