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

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

The airbag control unit CN15-14B321-BD is the control centre of the restraint system (SRS) at Ford. In a crash it compares the sensor values and decides within milliseconds which airbags and seatbelt pretensioners to trigger. It also monitors the entire system and reports faults via the airbag warning light.

The unit works constantly in the background, so that the system is ready for use at all times. It can only trigger reliably if it works faultlessly itself.

After an accident it stores crash data and locks itself.

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

Crash data is the most common cause: the unit stores it after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Airbag24 deletes it during the repair.

Further causes that can lead to failures are:

• ageing electronic components
• cold solder joints
• moisture and corrosion on the plug connections
• voltage spikes from a weak battery or jump-starting

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

The airbag warning light in the instrument cluster indicates the fault by lighting up permanently or intermittently. It may be accompanied by a fault message in the instrument cluster. In addition, a diagnostic tool may be unable to make a connection, or the fault memory cannot be cleared.

As long as these signs persist, the airbags and seatbelt pretensioners may not deploy in an emergency. A check is therefore advisable.

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

The part number CN15-14B321-BD appears at Ford. The control unit CN15-14B321-BD is fitted in these vehicles: Ford EcoSport 2 (2012-2015).

The table below shows which vehicles belong to this control unit.

• Ford EcoSport 2 (2012-2015)

Before you remove the unit, read out the fault memory. It shows whether the control unit is faulty or whether a plug or cable is causing the fault. Only after that should you compare the part number on the removed unit with this page.

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-BD work?

Processing at Airbag24 usually takes 3–4 working days: the unit is checked, repaired and tested. Beforehand, you read out the fault memory, remove the control unit and create a repair order online.

Before removal, attach the fault memory log to the unit, disconnect the battery and send the well-packed control unit in.

Airbag24 checks it on the test bench, replaces defective components, deletes the crash data and carries out a function test. Afterwards your own unit comes back 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-BD get to Airbag24?

A parcel is enough for the dispatch; alternatively, UPS collects the unit for an extra charge. The unit comes back to you by UPS as soon as the repair is complete.

The printed repair order goes into the box, and a shockproof packaging protects the control unit on its way.