Airbag control unit with part number 22711946

What does the airbag control unit 22711946 do?

As an airbag control unit, the 22711946 controls the restraint system (SRS) of Chevrolet. It processes the readings from the impact sensors, decides within a fraction of a second in an accident which airbags and seatbelt pretensioners to trigger, and continuously checks the system for faults.

A detected fault is shown by the airbag warning light. After an accident, the unit stores crash data and then locks itself.

The electronics work together with the sensors and airbags, so every component depends on the signals from the others.

Why does the control unit 22711946 fail?

Stored crash data is the most common cause in the 22711946, even if no airbag has been triggered. It cannot be erased with an ordinary diagnostic tool. Other possible causes are aged components, cold solder joints, moisture at plug connections and voltage spikes.

Aged electronic components lose reliability over time, and solder joints can become cold or brittle. Corrosion on plugs mainly develops where moisture gets in.

Voltage spikes occur, for example, with a weak battery or when jump-starting from another vehicle. They can also put strain on the electronics.

How can you tell that the 22711946 is defective?

The airbag warning light in the instrument cluster indicates a defect in the 22711946 when it lights up permanently or intermittently. This may be accompanied by a fault message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, or a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

A diagnostic tool that cannot establish a connection is also a sign of a problem in the system. A fault memory that cannot be emptied falls into the same category.

Have a permanently lit warning light checked promptly, as it indicates the fault.

Which vehicles is the 22711946 fitted in?

The 22711946 is fitted in these vehicles: Chevrolet Cobalt 1st generation (2004-2010). Whether your car is one of them is shown by comparing the details with your vehicle registration document.

The overview of vehicles follows here:

• Chevrolet Cobalt 1st generation (2004-2010)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. It does not establish the cause. Therefore, have the fault memory read out before removal, as the log shows whether the control unit itself is defective or whether 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 22711946 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only then remove the 22711946. Finally, create a repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The unit you own is then returned to you.

Airbag24 usually takes 3–4 working days to process the unit. 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 22711946 get to Airbag24?

Send your control unit 22711946 in as a parcel or book a UPS collection for an extra charge. Airbag24 sends the unit back to you by UPS after the repair.

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