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

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

The airbag control unit JK2T-14B321-AH is the central control unit of the restraint system (SRS) for Ford. It evaluates the sensor signals, decides in an accident within a few milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

It stores faults in the fault memory and reports them via the airbag warning light. This message is the indication you notice in everyday use.

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

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

Stored crash data is the most common cause: it remains in the unit after an accident even if no airbag has triggered, and a normal diagnostic tool cannot delete it. Other causes are ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data remains in the control unit until Airbag24 removes it during the repair. A diagnostic tool does not reach this step, so a read-out alone does not help at this point.

The other causes concern the electronics and their connections. Components age, solder joints can be poor, and moisture attacks the contacts. Voltage spikes from the vehicle electrical system also stress the unit.

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

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through an error message in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared.

• The airbag warning light in the instrument cluster lights up permanently or intermittently.
• An error message about the airbag system appears in the instrument cluster.
• The diagnostic tool cannot find the control unit.
• The fault memory cannot be emptied despite attempts to clear it.

If one of these signs appears, airbags and seatbelt pretensioners may not trigger in an emergency. Clarify the warning signal therefore promptly.

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

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

The overview for this part number is as follows:

• Ford Transit 7 ’14 (from 2014)

First check whether the part number on the label of the removed unit matches this page. This only ensures that it is the correct unit. Second, have the fault memory read out before you remove anything, because only the result shows whether the control unit is defective or whether 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-AH work?

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

Airbag24 checks the unit on the test bench, repairs defective components, deletes crash data and carries out a function test. Then your own unit goes back to you.

The order of steps on the vehicle is fixed for safety reasons.

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-AH get to Airbag24?

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

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