Airbag control unit with part number KT1T-14B321-AD

What does the airbag control unit KT1T-14B321-AD do?

The airbag control unit KT1T-14B321-AD controls the restraint system (SRS) of Ford. It reads the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in the event of an accident, and monitors the system continuously.

If the unit detects a fault, it displays it via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself.

Why does the control unit KT1T-14B321-AD fail?

The control unit KT1T-14B321-AD can fail because of crash data stored after an accident, even without triggered airbags. A standard diagnostic tool cannot remove this data.

Airbag24 removes this data during the repair, because it can be erased. Other causes are more likely to be ageing electronic components, cold solder joints, or moisture and corrosion at plug connectors. Voltage spikes, for example from a weak battery or a jump start, can also be a cause.

How can you tell that the KT1T-14B321-AD is defective?

The clearest sign is an airbag warning light in the instrument cluster that stays on permanently or intermittently. It may be accompanied by error messages when the fault on the KT1T-14B321-AD shows itself.

Typical signs at a glance:

• Airbag warning light stays on permanently or intermittently
• Error message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may fail to trigger in an emergency.

Which vehicles is the KT1T-14B321-AD fitted in?

The control unit KT1T-14B321-AD is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The following vehicles belong to this part number.

• Ford Transit 7 ’14 (from 2014)

The fault memory should be read out before removal, so that a plug or a cable can be ruled out as the cause with certainty. Then compare the part number on the label of the removed unit with this information.

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 KT1T-14B321-AD work?

First read out the fault memory, disconnect the battery, remove the control unit and create a repair order online. Then send the well-packed unit. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. The team then erases the crash data and carries out a function test.

You then receive your own unit 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 KT1T-14B321-AD get to Airbag24?

One parcel goes to Airbag24, or you book a UPS collection for an extra charge. The return is likewise made by UPS, as soon as the KT1T-14B321-AD has been repaired.

Enclose the printed repair order and pack the unit so that it is shock-resistant.