Airbag control unit with part number 77960-SNB-T815-M1

What does the airbag control unit 77960-SNB-T815-M1 do?

The airbag control unit 77960-SNB-T815-M1 coordinates the airbags and seatbelt pretensioners of the restraint system (SRS) at Honda. It measures via the crash sensors whether an accident requires triggering, and decides this within fractions of a second.

At the same time, it checks the entire system. If it finds a fault, it writes it to the fault memory and reports it via the airbag warning light.

After an accident, the unit records crash data and locks itself.

Why does the control unit 77960-SNB-T815-M1 fail?

Most often the 77960-SNB-T815-M1 fails because of crash data stored after an accident, even if no airbag was triggered. Aged components, moisture on plug connections and voltage spikes are also to be considered.

Crash data remains stored in the unit, because a diagnostic tool cannot remove it. This makes it one of the first points to check during the search.

Further causes are component ageing, corrosion in the contacts and cold solder joints. Voltage spikes, for example from a weak battery, can also stress the electronics. Which cause applies in the individual case must be shown by evaluating the fault memory.

How can you tell that the 77960-SNB-T815-M1 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-SNB-T815-M1 continuously or intermittently. Accompanying signs are an error message in the instrument cluster, a diagnostic tool that finds no control unit, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may not be able to trigger. The warning therefore deserves a quick clarification.

The cause is not obvious from the outside. Whether the control unit itself or a cable is affected only becomes clear when the fault memory is read out.

Which vehicles is the 77960-SNB-T815-M1 fitted in?

The 77960-SNB-T815-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The overview below lists the vehicles for this part number.

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page; this only shows that it is the right unit. To clarify the cause, have the fault memory read out, because only then does it become clear 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 77960-S02-A840-M3, 77960-SMG-G014-M1.

How does the repair of the 77960-SNB-T815-M1 work?

First you read out the fault memory and attach the log to the order. Then you disconnect the battery and remove the control unit 77960-SNB-T815-M1; afterwards you send it in, well packed, after creating the repair order online. At Airbag24, checking, repairing and testing usually take 3–4 working days.

On the test bench, Airbag24 examines the unit, repairs defective components, deletes the crash data and carries out a function test. The unit is then sent back to you.

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-T815-M1 get to Airbag24?

You send the control unit 77960-SNB-T815-M1 to Airbag24 as a parcel, or you book a collection by UPS for an extra charge. After repair, Airbag24 sends it back to you by UPS.

Pack the unit shockproof and enclose the printed repair order.