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

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

The airbag control unit JK2T-14B321-AG controls the restraint system (SRS) of Ford. It reads the crash sensors and decides in an emergency within milliseconds which airbags and seatbelt pretensioners fire. It reports detected faults via the airbag warning light.

The unit checks the connected components continuously while the vehicle is being driven. Every deviation is recorded as an entry in the fault memory, which a diagnostic tool can query.

After an accident, it stores crash data and locks itself.

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

The most common cause is stored crash data, even if no airbag was triggered in the accident. In brief, aged components, cold solder joints, moisture, corrosion and voltage spikes are also possible causes.

Crash data remains stored in the unit after an accident. It cannot be removed with a standard diagnostic tool; Airbag24 erases it during the repair.

Other causes come into consideration as well:

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

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

The airbag warning light lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

The warning light in the instrument cluster indicates the fault itself. It is therefore the first warning sign you will notice.

A fault memory that cannot be cleared points to the control unit or its connection. The exact cause only emerges from the read-out.

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

Match your vehicle against the details in the list. The control unit JK2T-14B321-AG is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The vehicles to which this part number fits follow here:

• Ford Transit 7 ’14 (from 2014)

The part number on the label of the removed unit can be compared with this page; that only establishes that it is the correct unit. You should also have the fault memory read out before removal, because only that shows whether the control unit is defective or a connector 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-AG work?

For the control unit JK2T-14B321-AG, first have the fault memory read out and enclose the report. Then disconnect the battery before the control unit is removed. Next, create a repair order online and pack the unit well for shipping.

Airbag24 examines the unit on the test bench and repairs defective components. Afterwards, the crash data is erased, a function test follows, and your own unit goes back to you.

Processing at Airbag24 usually takes 3–4 working days.

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-AG get to Airbag24?

Either you send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the control unit JK2T-14B321-AG back to you by UPS.

Put the printed repair order into the parcel and pack the control unit shock-resistant.