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

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

At Ford, the airbag control unit DT1T-14B321-HE forms the control centre of the SRS restraint system. It checks the crash sensors, selects within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It reports a fault via the airbag warning light. After a crash it records crash data and locks itself.

Only the repair lifts this lock.

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

Stored crash data is the most common cause of a failure, because it remains in the unit after a crash, even if no airbag fires. A normal diagnostic tool cannot remove it. Aged electronics, cold solder joints and moisture at plug connections, as well as voltage spikes, also play a role.

At Airbag24 the crash data is erased as part of the repair.

Voltage spikes arise, for example, from a weak battery or when a jump-start is connected, and they put a strain on the electronics.

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

The most important warning sign is the airbag warning light in the instrument cluster. Further signs appear as follows:

• The airbag warning light stays on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

In that case, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

Such signs should not be ignored; the light reports the defect continuously.

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

The vehicles with this DT1T-14B321-HE include the following: Ford Transit 7 ’14 (from 2014).

The list follows:

• Ford Transit 7 ’14 (from 2014)

Comparing the part number with the label of the removed unit only shows whether it is the correct unit. Whether the control unit is defective or a plug or cable is the cause is only determined by the fault memory, which you have read out beforehand.

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-HE work?

Processing at Airbag24 usually takes 3–4 working days: the DT1T-14B321-HE is checked, repaired if necessary, tested and then sent back.

Before sending, there is a fixed sequence for you: read out the fault memory and enclose the log, disconnect the battery, and only then remove the control unit. Then you create the repair order online and pack the unit well.

At Airbag24 the components are inspected on the test bench, stored crash data is erased and a function test is carried out.

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-HE get to Airbag24?

For shipping you can choose between a parcel or a UPS collection, which is booked for an extra charge. After the repair, Airbag24 sends the unit back via UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.