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

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

The airbag control unit DC3T-14B321-DC is the control centre of the restraint system (SRS) for Ford. It reads the crash sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners to trigger, and monitors the entire system. After an accident it stores crash data and locks itself.

Faults detected during monitoring are shown via the airbag warning light in the instrument cluster. All messages from the restraint system therefore converge in the unit.

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

Stored crash data is the most common cause on the DC3T-14B321-DC, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, as well as voltage spikes such as from a weak battery or a jump-start.

Crash data sits in the unit, and a diagnostic tool cannot get at it. The other causes act on the electronics rather gradually.

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

Signs of a defect on the DC3T-14B321-DC are a warning light, a fault message, or a diagnostic tool without connection. In an emergency the airbags and seatbelt pretensioners may then not deploy.

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

In this case have the system checked promptly. The light shows the defect; the exact cause is then determined by evaluating the fault memory.

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

The control unit DC3T-14B321-DC is fitted in these vehicles: Ford F-Series Super Duty 3 P473 (2011-2016).

The vehicle assignments we hold look like this:

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

Comparing the part number on the unit's label with this page only shows that you have the right unit. Whether it is faulty is revealed only by the fault memory, which you have read out beforehand, and it also shows whether a plug or cable is affected.

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

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

First have the fault memory read out on the DC3T-14B321-DC and enclose the log. Then disconnect the battery and only then remove the control unit. Next create a repair order online and send in the well-packed unit. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Only then does the work at Airbag24 begin: the unit is checked, defective components are repaired, the crash data is deleted and a function test is carried out. The unit then goes back to you.

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-DC get to Airbag24?

You can send the control unit DC3T-14B321-DC in as a parcel, or have it collected by UPS for an extra charge. Airbag24 sends it back by UPS after the repair. The printed repair order belongs in the parcel.

Pack the control unit shock-proof so that it survives transport undamaged.