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

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

The airbag control unit DT1T-14B321-AE is the central unit of the restraint system in Ford vehicles. It evaluates the crash sensors and determines within milliseconds in a crash which airbags and seatbelt pretensioners are triggered.

It monitors the system permanently and reports faults via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself.

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

Crash data stored after an accident is the most common cause on the DT1T-14B321-AE, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

Crash data cannot be erased with an ordinary diagnostic tool. Airbag24 erases it during the repair.

Voltage spikes occur, for example, with a weak battery or a jump-start. Such influences can stress electronics and plug connectors.

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

A defect in the DT1T-14B321-AE is indicated by the airbag warning light, which lights up permanently or intermittently. Added to this may be a fault message in the instrument cluster, a diagnostic tool without connection to the control unit and a fault memory that cannot be cleared.

In detail, these points stand out:

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

In that case airbags and seatbelt pretensioners may not deploy in an emergency. The warning light reports exactly this condition, so you should act promptly.

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

This assignment applies to vehicles from Ford. The control unit DT1T-14B321-AE is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The vehicles stored for this are listed here:

• Ford Transit 7 ’14 (from 2014)

Matching the part number on the label of the removed unit with this page only ensures that you have the correct unit. Whether the control unit is faulty or a plug or cable is the cause is clarified by the fault memory, which you should have read out before removal.

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-AE work?

At Airbag24, processing of the DT1T-14B321-AE normally takes 3–4 working days; this refers only to testing, repairing and checking. Your own steps follow separately: read out the fault memory, enclose the log, disconnect the battery, remove the control unit, create the repair order online and send in the unit well packed.

Airbag24 tests the control unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards your own unit is sent 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 DT1T-14B321-AE get to Airbag24?

Send the DT1T-14B321-AE as a parcel, or have it collected by UPS for an extra charge. After the repair, Airbag24 sends the control unit back to you by UPS.

The printed repair order goes into the parcel; pack the unit so that it is shock-resistant.