Airbag control unit with part number 77960-T2F-R010-M4

What does the airbag control unit 77960-T2F-R010-M4 do?

The airbag control unit 77960-T2F-R010-M4 coordinates the restraint system (SRS) for Honda. It processes the measured values from the crash sensors and decides in a collision, within fractions of a second, which airbags and seatbelt pretensioners are triggered.

It also monitors the entire system continuously. If it detects a fault, the airbag warning light in the instrument cluster lights up, and a message can appear in the display as well.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 77960-T2F-R010-M4 fail?

Crash data stored after an accident is the most common cause, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data stays in the unit until Airbag24 removes it during the repair. This step is therefore a fixed part of the process.

The other causes develop over a longer period. Electronic components lose performance over the years, solder joints can loosen, and moisture finds its way to the plugs. A weak battery or a jump start can also generate voltage spikes that strain the electronics.

How can you tell that the 77960-T2F-R010-M4 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

If one of these signs occurs, the airbags and seatbelt pretensioners may possibly not deploy in an emergency. This also applies if the car seems completely normal in everyday use.

A prompt check is therefore sensible, because the light is a message from the control unit itself and not merely a hint from a workshop.

Which vehicles is the 77960-T2F-R010-M4 fitted in?

The 77960-T2F-R010-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

In the following you see the vehicles as a list.

• Honda Accord 9th generation (2012-2019)

First check whether the part number on the label of the removed unit matches this page. That only confirms that it is the correct unit and says nothing about its condition. Also have the fault memory read out before removal, because only the log shows whether the control unit is defective or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SEA-G815-M1, 77960-T3L-A012-M1, C0W6K4VDA.

How does the repair of the 77960-T2F-R010-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Next create the repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days, and this period applies only to checking, repairing and testing. The unit then 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-T2F-R010-M4 get to Airbag24?

You send the unit 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 unit shock-resistant, so that it is protected during transport.