Airbag control unit with part number 77960-SNA-A214-M1

What does the airbag control unit 77960-SNA-A214-M1 do?

The airbag control unit 77960-SNA-A214-M1 is the central control unit of the SRS restraint system of Honda. It evaluates signals from the crash sensors and decides in an accident within milliseconds on airbags and seatbelt pretensioners. After an accident it stores crash data and locks itself.

During operation the unit monitors the sensors and wiring continuously. It stores faults it finds in the fault memory and displays them via the airbag warning light.

Safety in an emergency depends on this unit working flawlessly.

Why does the control unit 77960-SNA-A214-M1 fail?

Stored crash data after an accident is the most common cause with the 77960-SNA-A214-M1, even without a triggered airbag. Added to this are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the unit, because a normal diagnostic tool does not delete it. As long as it is stored, the fault persists.

The other causes concern the electronics themselves: components age, solder joints can go cold, and moisture attacks plug connections. Voltage spikes caused by weak batteries or jump starts also disturb the unit.

How can you tell that the 77960-SNA-A214-M1 is defective?

With the 77960-SNA-A214-M1 you recognise a defect by an airbag warning light that lights up permanently or intermittently, or by a fault message in the instrument cluster. In an emergency, airbags and seatbelt pretensioners may then not deploy.

Typical signs are:

• Airbag warning light lights up permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool finds no connection to the control unit
• Fault memory cannot be cleared

Follow up on each of these indications and have it checked.

Which vehicles is the 77960-SNA-A214-M1 fitted in?

First check whether the list names your vehicle. The control unit 77960-SNA-A214-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The list names the vehicles individually:

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page. That only confirms the right unit. Have the fault memory read out beforehand, 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-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-SNA-A214-M1 work?

For the 77960-SNA-A214-M1, first have the fault memory read out and enclose the log. Then disconnect the battery before you remove the control unit. After that create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and deletes the crash data. A functional test follows; then 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-SNA-A214-M1 get to Airbag24?

You send the 77960-SNA-A214-M1 to Airbag24 as a parcel, or alternatively book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

The printed repair order belongs in the parcel. Pack the unit so that it arrives shock-resistant.