Airbag control unit with part number 1228874

What does the airbag control unit 1228874 do?

In the restraint system (SRS) of Chevrolet, the airbag control unit 1228874 takes over control. In an accident it evaluates the signals from the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered.

Outside accidents, the unit continuously checks the connected technology. Faults are reported via the airbag warning light in the instrument cluster.

After an accident it stores crash data, after which it locks itself.

Why does the control unit 1228874 fail?

With the 1228874, stored crash data after an accident is the most common cause, even when no airbag has fired. Other causes are ageing electronics, cold solder joints, moisture on the connectors and voltage spikes.

Crash data cannot be dealt with using a common diagnostic tool; Airbag24 removes it during the repair.

• Ageing of the electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example with a weak battery or jump-starting

Whether one of these possibilities applies is decided only by the examination.

How can you tell that the 1228874 is defective?

A defect in the 1228874 can be recognised by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there is an error message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

Signs like these mean that airbags and seatbelt pretensioners may not deploy in an emergency.

A prompt examination is therefore most sensible.

Which vehicles is the 1228874 fitted in?

These vehicles use the control unit 1228874: Chevrolet Caprice 4th generation (1991-1996); Chevrolet Corsica L-Body (1987-1996); Chevrolet Beretta L-Body (1987-1996).

The vehicles are listed below.

• Chevrolet Caprice 4th generation (1991-1996)
• Chevrolet Corsica L-Body (1987-1996)
• Chevrolet Beretta L-Body (1987-1996)

Comparing the part number on the label of the removed unit with this page is done to confirm that you have the correct unit. Have the fault memory read out beforehand; only this result shows whether the control unit is defective or whether a line or plug is the cause.

For the same vehicles, we also repair control units with the part numbers 16177277.

How does the repair of the 1228874 work?

The first step is the fault memory, which you have read out on the 1228874; the log travels with the unit. Then disconnect the battery, remove the control unit and create a repair order online before sending it in well packed. At Airbag24, checking, repairing and testing usually take 3–4 working days.

At Airbag24 the unit is examined on the test bench. Defective components are replaced, crash data is deleted and a functional test is carried out.

Your own unit is then returned to the sender. 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 1228874 get to Airbag24?

Either the 1228874 goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is also made via UPS.

Enclose the printed repair order with the parcel, and the packaging protects the control unit from knocks.