Airbag control unit with part number DT1T-14B321-HF

What does the airbag control unit DT1T-14B321-HF do?

The airbag control unit DT1T-14B321-HF coordinates the restraint system (SRS) of Ford in the vehicle. It evaluates the crash sensors and determines which airbags and seatbelt pretensioners trigger in a crash.

The unit checks the system for faults continuously and displays them via the airbag warning light. It makes the triggering decision within milliseconds.

After an accident, it stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit DT1T-14B321-HF fail?

Stored crash data is the most common cause of failure for the DT1T-14B321-HF, even if no airbag has triggered. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

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

Ageing components and moisture affect the electronics over a longer period. Voltage spikes, for example with a weak battery or a jump start, occur at short notice.

How can you tell that the DT1T-14B321-HF is defective?

A defect in the DT1T-14B321-HF shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently, together with further clear indications.

The following signs occur in detail:

• airbag warning light stays on permanently or intermittently
• fault message in the instrument cluster
• diagnostic tool gets no connection to the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Which vehicles is the DT1T-14B321-HF fitted in?

The list shows in which vehicles the unit is installed. The DT1T-14B321-HF is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The vehicles listed for this part number are shown here:

• Ford Transit 7 ’14 (from 2014)

Comparing the part number on the label of the removed unit with this page confirms only that the unit fits, nothing more.

The fault memory is read out before removal. Only the result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers BK2T-14B321-BF, BK3T-14B321-AC, DT1T-14B321-DF, KT1T-14B321-KD, LK4Z-14B321-C, LK4Z-14B321-E.

How does the repair of the DT1T-14B321-HF work?

You read out the fault memory first and enclose the log. Then disconnect the battery and only then remove the DT1T-14B321-HF. Next, create a repair order online and send the unit in well packed. Testing, repairing and checking at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked on the test bench, defective components are replaced and stored crash data is erased. A function test follows, and then your own unit comes 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 DT1T-14B321-HF get to Airbag24?

The DT1T-14B321-HF reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns the unit to you by UPS.

Put the printed repair order into the parcel. Pack the control unit shock-proof before you send it.