Airbag control unit with part number 77960-SMR-F110-M1

What does the airbag control unit 77960-SMR-F110-M1 do?

The airbag control unit 77960-SMR-F110-M1 is the control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors, determines within milliseconds in an impact which airbags and seatbelt pretensioners trigger, and monitors the entire system. Reported faults appear via the airbag warning light.

After an accident the control unit stores crash data and then locks itself. The entire evaluation of the restraint system comes together in this unit.

Because the decision has only a few milliseconds in an emergency, the electronics work constantly in the background.

Why does the control unit 77960-SMR-F110-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, such as those from a weak battery or jump-starting.

Stored crash data arises as soon as the unit registers an accident. It remains until it is erased, and this also applies to an accident without airbag triggering.

The other causes concern electronics in general. Components age, solder joints can go cold, and moisture and corrosion damage plug connections. Voltage spikes also stress the unit.

How can you tell that the 77960-SMR-F110-M1 is defective?

A defect shows on the airbag warning light in the instrument cluster, which lights up permanently or intermittently, on a fault message in the instrument cluster, on a missing connection to the diagnostic tool, or on a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

The warning light is the most important sign, because the system displays faults through it. Permanent lighting means that the system has detected a fault, regardless of whether you are currently driving.

A fault memory that cannot be cleared calls for a closer check by reading out.

Which vehicles is the 77960-SMR-F110-M1 fitted in?

The 77960-SMR-F110-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The list shows the vehicles in which the part number is recorded with us.

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page. That only ensures that you have the right unit in front of you. Also have the fault memory read out beforehand, because only this log shows 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-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-F110-M1 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Create a repair order online and pack the unit well before sending it in. Airbag24 checks it, repairs defective components, erases the crash data and carries out a function test; processing usually takes 3–4 working days.

The sequence is mandatory for safety reasons, so please keep to it during removal.

After the function test, your own unit goes 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-F110-M1 get to Airbag24?

You send the unit as a parcel, or alternatively you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the control unit shock-proof.