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

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

The CN15-14B321-CF acts as the central unit controlling the restraint system (SRS) in Ford. It evaluates the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

It monitors the system continuously. If a fault occurs, it signals this via the airbag warning light.

After an accident it stores crash data and locks itself.

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

The most common cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot erase it. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or jump-starting.

The crash data therefore remains in the memory, even if nothing on the airbags is visibly wrong. Airbag24 erases it during the repair.

The other causes concern electronics and connections. A cold solder joint or a damp plug can cause faults just as well.

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

The airbag warning light in the instrument cluster lights up constantly or from time to time, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may therefore not trigger.

The light is the first thing you notice. It comes on as soon as the control unit detects a fault in the restraint system, which makes it a reliable indication.

Have the fault memory read out as soon as the light comes on, even if it goes out again afterwards.

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

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

The list shows the vehicles that are stored for this part number.

• Ford EcoSport 2 (2012-2015)

First compare the part number on the label of the removed unit with this page; this only ensures that you have the right unit in front of you. Also have the fault memory read out before removal, because only this 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 DN1T-14B321-EC, GN15-14B321-AF, GN15-14B321-GJ, GN1Z-14B321-AE, GN1Z-14B321-AK.

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

During the repair of the CN15-14B321-CF you first have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. After that you create a repair order online and send in the unit well packed. Airbag24 needs 3–4 working days for checking, repairing and testing.

This order serves safety. Airbag24 examines the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. Afterwards your own, repaired unit is returned 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 CN15-14B321-CF get to Airbag24?

You send the control unit CN15-14B321-CF in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it to you by UPS.

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