Airbag control unit with part number JK2T-14B321-FA

What does the airbag control unit JK2T-14B321-FA do?

The airbag control unit JK2T-14B321-FA is the central unit of the restraint system (SRS) in Ford. It processes the signals from the crash sensors, decides in an emergency within fractions of a second whether airbags and seatbelt pretensioners are triggered, and checks the system continuously. Faults are reported via the airbag warning light.

The unit is under observation by its own diagnostics throughout driving. It continuously compares the measured values with the target values.

If a crash event is registered after an accident, the control unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit JK2T-14B321-FA fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a diagnostic tool does not erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data comes from an impact that the unit has registered, even if little can be seen from the outside. A normal diagnostic tool cannot remove it.

Other causes at a glance:

• aged electronic components
• cold solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example with a weak battery or a jump start

How can you tell that the JK2T-14B321-FA 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 an error message in the instrument cluster. Also, a diagnostic tool without connection to the control unit and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the most important signal you will notice in everyday use. It reports a detected fault in the restraint system and must therefore be taken seriously.

If the connection to the diagnostic tool fails or the fault memory cannot be emptied, the system belongs in an inspection. Until then, it is not certain that airbags and seatbelt pretensioners will deploy.

Which vehicles is the JK2T-14B321-FA fitted in?

The airbag control unit JK2T-14B321-FA is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list shows which vehicles this part number is assigned to:

• Ford Transit 7 ’14 (from 2014)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Whether the control unit is defective or a plug or a cable is the cause is only clarified by the fault memory 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 JK2T-14B321-FA work?

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

At Airbag24, the unit is examined on the test bench. Defective components are repaired, the crash data is erased and a function test is carried out. Afterwards the unit returns to you.

The order must be observed for safety reasons: the control unit is only removed after the battery has been disconnected.

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 JK2T-14B321-FA get to Airbag24?

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

The printed repair order goes into the parcel. Pack the unit shock-proof so that it arrives undamaged.