Airbag control unit with part number GK2T-14B321-AC

What does the airbag control unit GK2T-14B321-AC do?

The airbag control unit GK2T-14B321-AC controls the restraint system (SRS) of Ford. It reads the values from the impact sensors, decides within fractions of a second in a crash whether airbags and seatbelt pretensioners are triggered, and continuously checks the system for faults, which it reports via the airbag warning light.

The unit works in the background throughout every journey. It monitors sensors, wiring and the triggering circuits, without anything being noticeable while driving as long as everything is in order.

After an accident, the control unit stores crash data and then locks itself. When it has been removed, it should therefore be handled with the same care as when it is installed.

Why does the control unit GK2T-14B321-AC fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

Crash data records that the control unit has registered an impact. The unit keeps it in memory, and it is only removed during the repair, when Airbag24 erases the crash data.

The other causes tend to develop gradually. Moisture and corrosion attack plugs, solder joints can give way under vibration, and voltage spikes when starting or with a weakened battery stress the electronics. Which of these applies in an individual case is only shown by the inspection.

How can you tell that the GK2T-14B321-AC is defective?

A defect shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently, as a fault message in the instrument cluster, as the diagnostic tool being unable to connect to the control unit, and as the fault memory being impossible to clear. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the most important signal. It indicates that a fault has been detected, and if it does not go out after the ignition is switched on, you should have the cause clarified promptly.

A fault message in the instrument cluster also shows that the system has detected something. A diagnostic tool that cannot establish a connection to the control unit points to a problem with the connection, not necessarily with the unit itself. A fault memory that cannot be cleared remains in this state until the cause has been eliminated.

Which vehicles is the GK2T-14B321-AC fitted in?

The control unit GK2T-14B321-AC belongs to Ford. It is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list below shows the vehicles stored for this part number.

• Ford Transit 7 ’14 (from 2014)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Also have the fault memory read out beforehand, because only the log shows whether the control unit itself 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 GK2T-14B321-AC work?

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

The order of these steps is binding for this unit, because it is safety-relevant. The log belongs in the parcel so that the findings are available during the inspection.

At Airbag24 the unit is examined on the test bench, defective components are replaced, stored crash data is erased and a function test is carried out. The stated processing time applies only to this work at Airbag24, not to your steps before it. 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 GK2T-14B321-AC get to Airbag24?

You send the control unit GK2T-14B321-AC in as a parcel or book a UPS collection. After the repair, Airbag24 returns the unit to you by UPS.

Place the printed repair order in the parcel and pack the control unit shock-resistant before handing it over.