Airbag control unit with part number 77960-SNA-M410-M1

What does the airbag control unit 77960-SNA-M410-M1 do?

The airbag control unit 77960-SNA-M410-M1 coordinates the restraint system (SRS) at Honda. It checks the signals from the crash sensors, decides in a crash within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

If the unit detects a fault, it writes it to the fault memory and shows it via the airbag warning light. The light is therefore the visible signal for the driver.

Without access to the fault memory, the unit can hardly be narrowed down.

Why does the control unit 77960-SNA-M410-M1 fail?

The most common cause is crash data stored after an accident, even though no airbag fired. A standard diagnostic tool does not erase it. Other causes are generally ageing, moisture, cold solder joints and voltage spikes.

Airbag24 erases the crash data during the repair, so this cause is eliminated.

The other causes include:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion on plug connections
• Voltage spikes, for example with a weak battery or a jump start

How can you tell that the 77960-SNA-M410-M1 is defective?

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

• Airbag warning light in the instrument cluster lights up permanently
• Airbag warning light lights up only intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot find the control unit
• Fault memory cannot be cleared

These signs are no reason to wait. You should have the fault memory read out.

Which vehicles is the 77960-SNA-M410-M1 fitted in?

The control unit 77960-SNA-M410-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011). The basis is the information available for this unit.

Here is the overview of the vehicles for this unit:

• Honda Civic 8th generation (2005-2011)

A comparison of the part number on the label of the removed unit with this page only ensures that it is the right unit. You should have the fault memory read out before removal, because only it shows whether the control unit is defective or whether 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-SNA-M410-M1 work?

First read out the fault memory and enclose the log. Then disconnect the battery. Only after that remove the control unit, create a repair order online and send in the device well packed.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. The unit then returns to you.

Processing at Airbag24 usually takes 3–4 working days. This period covers only checking, repairing and testing. 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-SNA-M410-M1 get to Airbag24?

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

Put the printed repair order into the parcel and pack the control unit shockproof.