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

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

The airbag control unit CN15-14B321-CC is the central control unit of the restraint system (SRS) of Ford. It reads the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system in continuous operation.

If the system detects a fault, the airbag warning light in the instrument cluster lights up. A fault message also appears there.

An accident causes crash data to be stored in the control unit, and the unit locks itself. The lock is only lifted by a repair.

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

The most common cause for the CN15-14B321-CC is the storage of crash data from an accident, even if no airbag has deployed. Other triggers are aged electronics, cold solder joints, moisture and voltage spikes.

Crash data remains in the unit and cannot be removed with a normal diagnostic tool. This explains why a fault search alone does not eliminate it.

Apart from the crash data, these points are mainly to be considered:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

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

On the CN15-14B321-CC, the airbag warning light in the instrument cluster lights up permanently or flickers intermittently. Accompanying this are a fault message, a missing contact with the diagnostic tool and a fault memory that cannot be cleared. In that case, the airbags and seatbelt pretensioners may not be able to deploy in an emergency.

The warning light is a clear indication of the system, and it is not something to dismiss as minor. Even an intermittent lighting up is reason enough to have the system examined.

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

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

For this unit, the following models are on record for us:

• Ford EcoSport 2 (2012-2015)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out in addition, because only this log shows whether the control unit itself is at fault or whether a connector 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-CC work?

For the repair of the CN15-14B321-CC, first read out the fault memory and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Then create a repair order online and pack the unit well before sending it.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Afterwards, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. This time covers only inspection, repair and testing.

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-CC get to Airbag24?

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

The printed repair order goes into the parcel, and the unit must be packed shockproof.