Airbag control unit with part number CN15-14B321-AF

What does the airbag control unit CN15-14B321-AF do?

The airbag control unit CN15-14B321-AF coordinates the restraint system (SRS) of Ford. It evaluates the crash sensors, determines in an accident the triggering of airbags and seatbelt pretensioners, and reports faults via the airbag warning light.

During operation the unit constantly checks the system for deviations. In doing so it monitors wiring, sensors and actuators.

After an accident it stores crash data and locks itself. This lock is part of the unit's function.

Why does the control unit CN15-14B321-AF fail?

The most common cause is crash data after an accident, even when no airbag has fired. Further causes are ageing electronic components, cold solder joints, moisture at plug connections and voltage spikes.

A normal diagnostic tool cannot remove the crash data. Airbag24 erases them during the repair.

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from jump-starting

How can you tell that the CN15-14B321-AF is defective?

The airbag warning light lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory remains.

• Airbag warning light permanently or intermittently on
• Fault message in the instrument cluster
• No connection from the diagnostic tool to the control unit
• Fault memory cannot be cleared

Airbags and seatbelt pretensioners may then possibly not fire in an emergency.

Which vehicles is the CN15-14B321-AF fitted in?

The control unit CN15-14B321-AF is fitted in these vehicles: Ford EcoSport 2 (2012-2015).

These models are listed for this control unit:

• Ford EcoSport 2 (2012-2015)

Comparing the label of the removed unit with this page confirms that the unit is the right one. The cause, however, is clarified only by reading out the fault memory, because it shows whether the control unit is defective or whether a plug or a cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers DN1T-14B321-EC, GN15-14B321-AF, GN15-14B321-GJ, GN1Z-14B321-AE, GN1Z-14B321-AK.

How does the repair of the CN15-14B321-AF work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Create the repair order online and send the well-packed unit.

Then you send the well-packed unit in. Airbag24 checks it on the test bench, repairs defective components, erases the crash data and carries out a function test. Afterwards your own unit goes back to you.

The 3–4 working days apply only to checking, repairing and testing at Airbag24. 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 CN15-14B321-AF get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 sends the repaired unit back by UPS.

Put the printed repair order in the parcel; the control unit is packed shock-proof.