Airbag control unit with part number 77960-SMG-E110-M1

What does the airbag control unit 77960-SMG-E110-M1 do?

The airbag control unit 77960-SMG-E110-M1 controls the entire restraint system in Honda vehicles. It measures the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and then stores crash data. Afterwards it locks itself.

During normal operation, the unit continuously checks all connected components. It shows faults via the airbag warning light in the instrument cluster. Only a repair lifts the lock after an accident.

Why does the control unit 77960-SMG-E110-M1 fail?

Crash data from an accident is the most common cause with the 77960-SMG-E110-M1, even if no airbag was deployed. This data cannot be removed with a standard diagnostic tool. Other possible causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes from a weak battery or a jump start.

Airbag24 erases the crash data during the repair. This removes the entry that would otherwise remain in memory.

The remaining causes concern ageing, solder joints and contacts. Aged components and cold solder joints change how the electronics behave, moisture attacks contacts, and voltage spikes place an additional load on the control unit.

How can you tell that the 77960-SMG-E110-M1 is defective?

The airbag warning light in the instrument cluster signals a defect on the 77960-SMG-E110-M1 by lighting up, either permanently or intermittently. A fault message may also appear in the instrument cluster, the diagnostic tool may fail to connect to the control unit, or the fault memory cannot be erased.

While such a defect exists, airbags and seatbelt pretensioners may not deploy in an emergency. The warning light is therefore a sign that the vehicle should be checked promptly.

Which vehicles is the 77960-SMG-E110-M1 fitted in?

The 77960-SMG-E110-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The list is directly below:

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page. That confirms the unit matches this page, but not whether it is defective. So have the fault memory read out beforehand, because only this result shows whether the control unit or 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-SMG-E110-M1 work?

Beforehand, have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit 77960-SMG-E110-M1. Next, create the repair order online and send the unit in. Airbag24 needs 3–4 working days to process it.

At Airbag24, the unit is examined on the test bench. Defective components are repaired, crash data is erased and the unit then undergoes a function test. Afterwards 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-SMG-E110-M1 get to Airbag24?

You send the control unit 77960-SMG-E110-M1 as a parcel, or you book a UPS collection for an extra charge. UPS handles the return journey after the repair.

The printed repair order goes into the parcel. Pack the control unit shockproof.