Airbag control unit with part number 77960-TFK-D010-M4

What does the airbag control unit 77960-TFK-D010-M4 do?

The airbag control unit 77960-TFK-D010-M4 is the central control unit of the SRS system for Honda. It reads the crash sensors, determines within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the entire system.

It reports faults via the airbag warning light in the instrument cluster.

An accident leaves crash data in the unit, and after that it locks itself.

Why does the control unit 77960-TFK-D010-M4 fail?

With the 77960-TFK-D010-M4, the most common cause is crash data stored after an accident, even if no airbag has triggered. Further causes may include aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

Crash data remains stored in the unit after an accident, and a normal diagnostic tool cannot erase it. Airbag24 takes over this erasing during the repair.

The other causes are of a more general nature. Electronic components can age, cold solder joints can cause contact problems, and damp and corrosion attack the plugs.

Voltage spikes, for example from a weak battery or a jump start, can also contribute to the fault.

How can you tell that the 77960-TFK-D010-M4 is defective?

On the 77960-TFK-D010-M4, a defect is recognised by several signs in the instrument cluster and on the diagnostic tool. In an emergency, airbags and seatbelt pretensioners may then not trigger.

• The airbag warning light is on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool does not get a connection to the control unit.
• The fault memory cannot be cleared.

As soon as any of these signs appear, you should have the system checked.

The warning comes from the unit itself and must be taken seriously.

Which vehicles is the 77960-TFK-D010-M4 fitted in?

The 77960-TFK-D010-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

These vehicles are recorded for this part number, as the following list shows.

• Honda Civic 10th generation (2015-2022)

Check the part number on the label of the removed control unit against this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because only this result 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-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-TFK-D010-M4 work?

For the repair of the 77960-TFK-D010-M4, start with the fault memory: read it out and attach the log. Then disconnect the battery; only after that is the control unit removed. You create the repair order online, then pack the unit and send it in.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a functional test. For checking, repairing and testing, allow 3–4 working days, after which 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-TFK-D010-M4 get to Airbag24?

You can send the 77960-TFK-D010-M4 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

The repair order goes printed into the parcel, and the unit is packed shock-proof.