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

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

The airbag control unit JK2T-14B321-CB is the central control unit of the restraint system (SRS) for Ford. In an accident it evaluates the signals from the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

At the same time the unit monitors the function of the entire system. If it detects a fault, it shows it via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself. More on this is left open here.

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

The most common cause for the JK2T-14B321-CB is crash data stored after an accident, even if no airbag has deployed. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

That no airbag has triggered does not mean the unit has stored nothing. The crash data remains in memory, and a normal diagnostic tool cannot erase it.

The other causes concern the electronics themselves. Components age, solder joints can be cold, and moisture attacks plug connections. A weak battery or a jump-start can cause voltage spikes that stress the electronics.

How can you tell that the JK2T-14B321-CB is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

In this case airbags and seatbelt pretensioners may fail to deploy in an emergency. This is the reason to take these signs seriously.

The light shows the fault. You should therefore watch it and not ignore it.

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

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

The vehicles assigned to this part number are listed below.

• 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 correct unit. Also have the fault memory read out beforehand, because only the log shows whether the control unit is defective or a plug or cable is the cause.

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-CB work?

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

This sequence is mandatory for safety reasons. Pack the unit well and send it in.

Airbag24 tests it on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned.

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-CB get to Airbag24?

You send the unit JK2T-14B321-CB as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

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