Airbag control unit with part number CK4T-14B321-EB

What does the airbag control unit CK4T-14B321-EB do?

The airbag control unit CK4T-14B321-EB is the central control unit of the airbag system of Ford. It processes the signals of the crash sensors and decides in a crash which airbags and seatbelt pretensioners are triggered.

During operation it monitors all components of the system. If it detects a fault, it stores it and reports it via the airbag warning light.

After a crash, the unit stores crash data and locks itself.

Why does the control unit CK4T-14B321-EB fail?

The most common cause is stored crash data after an accident, even without a triggered airbag. A normal diagnostic tool does not erase it; Airbag24 removes it during the repair.

Further causes are aged electronic components and cold solder joints on the circuit board. Moisture and corrosion at the plug connections can also impair the function.

Voltage spikes, for example from a weak battery or a jump-start, are also among the possible triggers of a failure. Which of these causes applies is clarified by the examination.

How can you tell that the CK4T-14B321-EB is defective?

The airbag warning light is on constantly or intermittently, an error message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

Pay particular attention to the following signs:

• airbag warning light that is on permanently or intermittently
• error message in the instrument cluster
• missing connection to the control unit when reading out
• fault memory that cannot be cleared

In the event of a defect, airbags and seatbelt pretensioners may fail to deploy in an emergency.

Which vehicles is the CK4T-14B321-EB fitted in?

The control unit CK4T-14B321-EB is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list of vehicles that belong to this part number follows below.

• Ford Transit 7 ’14 (from 2014)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. Having the fault memory read out, on the other hand, shows whether the control unit is the cause or whether a plug or cable is responsible.

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 CK4T-14B321-EB work?

First read out the fault memory and attach the log. Then disconnect the battery, remove the control unit and create a repair order online, before you send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

The sequence is fixed for your safety. Pack the unit carefully.

Airbag24 checks the control unit, replaces defective components, erases the stored crash data and carries out a function test. The unit then returns 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 CK4T-14B321-EB get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.