Airbag control unit with part number CK4T-14B321-CG

What does the airbag control unit CK4T-14B321-CG do?

The airbag control unit CK4T-14B321-CG controls the restraint system (SRS) in the Ford vehicle. It evaluates the sensor signals, determines in a crash within milliseconds which airbags and seatbelt pretensioners trigger, and checks the system continuously.

Faults are shown by the unit via the airbag warning light in the instrument cluster. The display makes disturbances visible to you.

After an accident, the unit stores crash data and locks itself.

Why does the control unit CK4T-14B321-CG fail?

Crash data from an accident is the most common cause, even if no airbag has deployed. Further causes include aged electronics, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes, for example from a weak battery or jump-starting.

Stored crash data cannot be erased with an ordinary diagnostic tool. It therefore remains in the unit until Airbag24 erases it during the repair.

The other causes tend to develop gradually. Aged electronics lose stability over time, cold solder joints can come loose again, and moisture with corrosion affects the plugs. Voltage spikes when starting or during a jump-start are an additional trigger.

How can you tell that the CK4T-14B321-CG is defective?

A defect can be recognised by a warning sign on the airbag warning light, a message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that remains. In an emergency, airbags and seatbelt pretensioners may not be able to deploy.

Pay particular attention to the following signs:

• Airbag warning light on permanently or intermittently
• Message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory remains

A readout clarifies whether the control unit is affected. Until then, the check should be carried out promptly.

Which vehicles is the CK4T-14B321-CG fitted in?

The airbag control unit CK4T-14B321-CG is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list covers the following vehicles:

• Ford Transit 7 ’14 (from 2014)

A comparison of the part number on the label with this page shows that it is the right unit, nothing more. You only see whether the control unit is defective from the fault memory. Have it read out before removal so that it is clear whether a plug or a cable could be 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 CK4T-14B321-CG work?

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

The sequence must be followed for safety reasons, and it applies without exception.

At Airbag24, the unit is checked on the test bench. Defective components are repaired, the crash data is erased and a functional test is carried out. The unit then returns to you.

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 CK4T-14B321-CG get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns the unit to you by UPS after the repair.

Include the printed repair order in the parcel. The unit must be packed shock-resistant.