Airbag control unit with part number KC24-14B321-BA

What does the airbag control unit KC24-14B321-BA do?

The airbag control unit KC24-14B321-BA is the control centre of the restraint system (SRS) in Ford vehicles. It evaluates the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and at the same time monitors the function of the system. If it detects a fault, it indicates this via the airbag warning light.

This includes checking the connected components throughout operation. The unit stores irregularities in the fault memory.

After an accident, the unit creates crash data. It is then locked, and this lock ends only with the repair.

Why does the control unit KC24-14B321-BA fail?

Crash data from an accident is the most common cause, even when no airbag has deployed. An ordinary diagnostic tool cannot remove this data. Other causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

The crash data is removed as part of the repair.

The other causes concern the technology itself:

• ageing electronic components
• cold solder joints
• moisture and corrosion on plug connectors
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the KC24-14B321-BA is defective?

A defect becomes apparent when the airbag warning light in the instrument cluster lights up, an error message appears in the instrument cluster, the diagnostic tool remains without connection, or the fault memory cannot be cleared. In that case, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

The display in the instrument cluster is not a minor matter but the direct sign that the restraint system needs to be checked.

The fault memory reveals more when it is read out, and this should happen before any further steps.

Which vehicles is the KC24-14B321-BA fitted in?

The assignment covers the make Ford. There, the control unit KC24-14B321-BA is fitted in these vehicles: Ford E-Series 4 (2008-2020).

The assignment in detail:

• Ford E-Series 4 (2008-2020)

Comparing the part number on the label with this page only confirms that it is the right unit. Only the fault memory read-out shows whether the control unit itself is defective or a plug or cable is responsible. Have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 8C2Z-14B321-A, 9C24-14B321-BJ, AC24-14B321-BA, BC24-14B321-AB, BC24-14B321-AC, BC24-14B321-AD.

How does the repair of the KC24-14B321-BA work?

First arrange for the fault memory to be read out, and the log goes with the unit. In the next step, disconnect the battery and then remove the control unit. Finally, create the repair order online and send the unit in carefully packed.

At Airbag24 the unit is checked, defective components are replaced, the crash data is erased and a function test is carried out. Afterwards the unit is returned to you. Processing 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 KC24-14B321-BA get to Airbag24?

A parcel with the unit goes to Airbag24, or you book a UPS collection for an extra charge. After the repair, the unit is sent back by UPS.

The printed repair order goes in, and the unit is packed shockproof.