Airbag control unit with part number DC3T-14B321-BA

What does the airbag control unit DC3T-14B321-BA do?

The airbag control unit DC3T-14B321-BA is the link between the crash sensors and the triggers in the restraint system (SRS) of Ford. In an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered.

The control unit evaluates the crash sensors continuously and checks the trigger circuits even when nothing happens. Faults are shown via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit DC3T-14B321-BA fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery.

A normal diagnostic tool cannot erase crash data. Airbag24 removes it during the repair.

The other causes affect the electronics and their connections. Components age, solder joints can be cold, and moisture and corrosion impair the plugs. Voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the DC3T-14B321-BA is defective?

A defect reveals itself through the airbag warning light, which stays on permanently or intermittently, through error messages in the instrument cluster, through a diagnostic tool without connection, and through a fault memory that cannot be emptied. In an emergency the airbags and seatbelt pretensioners may therefore not trigger.

The warning light is noticed first and is therefore the most important sign. Do not ignore this warning.

If the diagnostic tool cannot connect, the control unit is not necessarily to blame. A plug, a cable or the power supply can also be responsible, and only the readout shows which applies.

Which vehicles is the DC3T-14B321-BA fitted in?

The control unit DC3T-14B321-BA is fitted in these vehicles: Ford F-Series Super Duty 3 P473 (2011-2016). The assignment refers to the part number, not to the individual unit in front of you.

The overview of the vehicles for this part number follows below.

• Ford F-Series Super Duty 3 P473 (2011-2016)

First check whether the part number on the label of the removed unit matches this page. Then you have the right unit in front of you. Have the fault memory read out beforehand as well, because only this log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers BC3Z-14B321-M, DC3T-14B321-BB, DC3T-14B321-DC, DC3Z-14B321-D.

How does the repair of the DC3T-14B321-BA work?

First have the fault memory read out and attach the log, then disconnect the battery and afterwards remove the control unit DC3T-14B321-BA. Then you create the repair order online and pack the unit well. At Airbag24 it goes to the test bench, damaged parts are repaired, crash data is erased and a function test concludes.

These requirements concern safety during removal.

Processing at Airbag24 usually takes 3–4 working days. Afterwards your own unit goes back.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit DC3T-14B321-BA get to Airbag24?

One parcel is enough, or you book a UPS collection for an extra charge. After the repair Airbag24 sends the unit back by UPS.

The printed repair order belongs in the parcel. The unit must be packed shock-proof.