Airbag control unit with part number 22727278

What does the airbag control unit 22727278 do?

The airbag control unit 22727278 is the central control unit of the restraint system (SRS) for Chevrolet. It evaluates the signals from the crash sensors, decides within a fraction of a second in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. If it detects a fault, it indicates this via the airbag warning light.

In the background the unit continuously checks all components of the restraint system. Deviations are recorded in the fault memory so that a workshop can trace them.

After an accident the control unit stores crash data and locks itself.

Why does the control unit 22727278 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Airbag24 erases it during the repair. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains in the memory after an accident until it is deliberately removed. An ordinary diagnostic tool cannot access it.

Aged components and cold solder joints lead to faults that only occur intermittently and are therefore hard to track down. Moisture and corrosion at plug connections impair the contact, and voltage spikes additionally stress the electronics.

How can you tell that the 22727278 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears. In addition, the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be erased. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light indicates a detected fault even when nothing unusual is noticed while driving. For this reason it deserves particular attention.

As soon as the light comes on, have the fault memory read out, because the entry remains stored even after the display goes out again.

Which vehicles is the 22727278 fitted in?

The control unit 22727278 is fitted in these vehicles: Chevrolet Cobalt 1st generation (2004-2010).

The following list names the vehicles for which the unit is listed:

• Chevrolet Cobalt 1st generation (2004-2010)

Compare the part number on the label of the removed unit with this page. This confirms that it is the right unit. Also have the fault memory read out, because only the result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 15249432, 22729009, 22729011.

How does the repair of the 22727278 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days; during this time Airbag24 tests the unit, repairs defective components, erases stored crash data and carries out a function test.

The order is mandatory for safety reasons. The battery must be disconnected before the control unit is removed.

After the function test Airbag24 returns your own unit to you. The time refers only to the work at Airbag24 and does not include your steps or the dispatch.

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 22727278 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

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