Airbag control unit with part number 77960-SNB-U822-M1

What does the airbag control unit 77960-SNB-U822-M1 do?

The 77960-SNB-U822-M1 coordinates the restraint technology, that is the airbags and seatbelt pretensioners, in the Honda. Using the crash sensors it detects an accident and triggers the appropriate components within milliseconds. In normal operation it monitors the connections and components of this system.

If the electronics detect a fault, the airbag warning light in the instrument cluster lights up. The unit also stores faults in memory so that they can be read out later.

If an accident has occurred, the control unit creates crash data and locks itself. The lock ends only with the repair.

Why does the control unit 77960-SNB-U822-M1 fail?

Storing crash data after an accident is the most common cause for the 77960-SNB-U822-M1, even if no airbag has deployed. Ageing, cold solder joints, moisture with corrosion on plugs and voltage spikes can also cause the failure.

Crash data stays in the unit until it is removed deliberately. An ordinary diagnostic tool cannot do this.

The other causes are general in nature. Electronic components age, solder joints can have become cold, and moisture promotes corrosion at plug connections. Voltage spikes arise, for example, with a weak battery or when starting with a jump start.

How can you tell that the 77960-SNB-U822-M1 is defective?

The airbag warning light in the instrument cluster indicates a fault on the 77960-SNB-U822-M1 by lighting up permanently or intermittently. Added to this are a fault message, a missing connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the indication you should take seriously first. A fault that remains in memory points to a malfunction that must be checked.

Connection problems with the diagnostic tool also belong to the findings you should not ignore.

Which vehicles is the 77960-SNB-U822-M1 fitted in?

The 77960-SNB-U822-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The following models are recorded for this unit:

• Honda Civic 8th generation (2005-2011)

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

For the same vehicles, we also repair control units with the part numbers 77960-S02-A840-M3, 77960-SMG-G014-M1.

How does the repair of the 77960-SNB-U822-M1 work?

For the repair of the 77960-SNB-U822-M1, the fault memory is read out first and the log is enclosed. Then you disconnect the battery and remove the control unit. Airbag24 needs 3–4 working days for inspection, repair and testing.

Then create a repair order online and send the well-packed unit in. Airbag24 checks it on the test bench, repairs defective components, erases the crash data and carries out a function test.

Afterwards your own unit comes back to you. The 3–4 working days refer solely to the work at Airbag24.

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-SNB-U822-M1 get to Airbag24?

You send the 77960-SNB-U822-M1 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Enclose the printed repair order with the unit. The unit must be packed shockproof.