Airbag control unit with part number 77960-T2F-K012-M4

What does the airbag control unit 77960-T2F-K012-M4 do?

As an SRS control unit, the airbag control unit 77960-T2F-K012-M4 controls the restraint system of Honda. It reads the sensors, determines in an accident within fractions of a second which airbags and seatbelt pretensioners fire, and monitors the system during operation. It reports faults via the airbag warning light in the instrument cluster.

The sensors are installed at several points in the vehicle and supply data continuously. The control unit compares this data with fixed criteria before it issues a trigger command.

If the vehicle is involved in an accident, the unit stores crash data and then locks itself. In doing so, it also works as an event memory for the workshop.

Why does the control unit 77960-T2F-K012-M4 fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag was triggered. A normal diagnostic tool cannot remove it. Added to this are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Such entries remain in place, even if the vehicle keeps driving and the airbags did not trigger. Only the repair at Airbag24 removes them.

The other causes lie in the unit itself or in its surroundings in the vehicle. A moist plug connection can affect the electronics just as a voltage spike can.

How can you tell that the 77960-T2F-K012-M4 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, and the 77960-T2F-K012-M4 also shows the fault through a message in the instrument cluster. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In a crash, the airbags and seatbelt pretensioners may then fail to trigger.

The warning light is therefore not a side issue, but a sign of the restraint system as a whole.

Which vehicles is the 77960-T2F-K012-M4 fitted in?

The 77960-T2F-K012-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

These models are on record in the assignment for this part number:

• Honda Accord 9th generation (2012-2019)

Before you place a repair order, check the part number on the label of the unit and the fault memory. The comparison with this page only shows that the unit fits. The cause is established only by the log, which shows whether the control unit is defective or whether a connector or cable is responsible.

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-K012-M4 work?

Have the fault memory read out and keep the log before you disconnect the battery. Then remove the 77960-T2F-K012-M4, create the repair order online and send the unit in well packed. At Airbag24, checking, repairing and testing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and performs a function test. Afterwards your own unit is returned.

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-K012-M4 get to Airbag24?

Send the unit as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns the 77960-T2F-K012-M4 by UPS. The printed repair order goes into the parcel.

Pack the unit in a sturdy, shock-proof package so that it arrives safely.