Airbag control unit with part number 77960-SNA-A219-M1

What does the airbag control unit 77960-SNA-A219-M1 do?

The airbag control unit 77960-SNA-A219-M1 is the control unit of the restraint system (SRS) for Honda. It processes the sensor signals, decides in a crash within milliseconds on triggering airbags and seatbelt pretensioners, and monitors the system constantly. It indicates anomalies via the airbag warning light.

The unit registers faults itself and stores them in memory. The system thus remains traceable, even if it was not triggered.

After a crash it creates crash data and locks itself. The lock can only be lifted by repair.

Why does the control unit 77960-SNA-A219-M1 fail?

The most common cause with 77960-SNA-A219-M1 lies in stored crash data, even if no airbag has fired. Further causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data remains in memory, and a standard diagnostic tool cannot reach it. Erasing this data is part of the repair at Airbag24.

Aged components and cold solder joints belong to the causes arising from the electronics itself.

Moisture and corrosion on plug connections, as well as voltage spikes, for example from a weak battery or jump-starting, can likewise cause faults.

How can you tell that the 77960-SNA-A219-M1 is defective?

You can recognise a defect on the 77960-SNA-A219-M1 by several signs. The airbag warning light lights up permanently or intermittently, fault messages appear in the instrument cluster, the diagnostic tool finds no connection, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then not trigger in an emergency.

Typical signs at a glance:

• Airbag warning light lit permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

The light shows the finding in the instrument cluster, so a glance is enough to notice it.

Which vehicles is the 77960-SNA-A219-M1 fitted in?

The airbag control unit 77960-SNA-A219-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The vehicles are listed below.

• Honda Civic 8th generation (2005-2011)

The part number on the label can be compared with this page; that only establishes the identity of the unit. The fault memory, on the other hand, answers whether the control unit itself is defective or whether a connector or a cable is the cause. Therefore have it read beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-SMG-G014-M1, 77960-SMG-G021-M1, 77960-SMG-G120-M1, 77960-SNA-L220-M1, 77960-SNA-L230-M1, 77960-SNA-M410-M1.

How does the repair of the 77960-SNA-A219-M1 work?

The fault memory of the 77960-SNA-A219-M1 is read first, and you enclose the log; then you disconnect the battery and only then remove the control unit. You then create the repair order online, with which the well-packed unit makes its way to Airbag24. Processing at Airbag24 usually takes 3–4 working days.

The test on the test bench precedes the repair, during which defective components are replaced and crash data is erased. A function test comes at the end, and the return shipment follows.

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 77960-SNA-A219-M1 get to Airbag24?

The control unit 77960-SNA-A219-M1 reaches Airbag24 either as a parcel or via a UPS collection booked for an extra charge. Once completed, it goes back to you by UPS.

The printed repair order goes into the parcel, and you pack the unit shock-proof.