Airbag control unit with part number 77960-SMR-S011-M1

What does the airbag control unit 77960-SMR-S011-M1 do?

The airbag control unit 77960-SMR-S011-M1 is the central control unit of the restraint system (SRS) for Honda. It checks the signals from the crash sensors and, in an accident, decides within a fraction of a second which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors the entire system. If it detects a fault, it reports this via the airbag warning light and a fault message in the instrument cluster.

After an accident the control unit stores crash data and locks itself. This lock is the reason why a unit cannot simply be reused after an accident.

Why does the control unit 77960-SMR-S011-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag has been triggered, and a standard diagnostic tool cannot remove it. Further causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump-start.

Crash data is created as soon as the sensors register an impact, regardless of whether an airbag actually fires. That is exactly why the finding can only come to light during diagnosis.

The other causes can act over a long period. Moisture and corrosion attack the contacts, and aged components lose their reliability over time.

How can you tell that the 77960-SMR-S011-M1 is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. In addition there is a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

A defective control unit can mean that airbags and seatbelt pretensioners may not trigger in an emergency. The warning light is therefore not a cosmetic issue, but a sign that you should look into promptly.

Anyone who overlooks the light in everyday life loses valuable time. A glance at the instrument cluster after every start helps to notice a fault early.

Which vehicles is the 77960-SMR-S011-M1 fitted in?

According to our current data, this allocation applies to Honda. The airbag control unit 77960-SMR-S011-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The following list shows the vehicles linked to this part number in our data.

• Honda Civic 8th generation (2005-2011)

First compare the part number on the label of the removed unit with this page; that only confirms the identity of the unit. The fault memory must be read beforehand, because only this finding shows whether the control unit 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-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-SMR-S011-M1 work?

First have the fault memory read and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send in the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components by repair, erases stored crash data and carries out a function test. Only then is your own unit 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-SMR-S011-M1 get to Airbag24?

The unit goes to Airbag24 as a parcel, or alternatively you book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

Enclose the printed repair order with the parcel, and pack the control unit shock-proof.