Airbag control unit with part number 77960-T7S-M610-M2

What does the airbag control unit 77960-T7S-M610-M2 do?

The airbag control unit 77960-T7S-M610-M2 is the central control unit of the restraint system (SRS) for Honda. It measures the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners trigger, and reports faults via the airbag warning light.

While driving, the unit checks the entire restraint system continuously. The results of this check determine whether the warning light is on.

After an accident the control unit creates crash data and locks itself. Beyond that, nothing more needs to be known about this state for the function of the unit.

Why does the control unit 77960-T7S-M610-M2 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. In addition there are aged electronic components, cold solder joints, moisture or corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

Crash data remains in the control unit after the event. It cannot be removed with usual diagnostic technology, and so the problem persists even when the vehicle is started again.

The other causes can develop over a longer period. Aged components and moist or corroded contacts lead to faults that occur irregularly.

How can you tell that the 77960-T7S-M610-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or only intermittently, and an error message also appears in the instrument cluster. The diagnostic tool gets no connection, and the fault memory cannot be cleared.

The warning light is the most important warning signal. As long as it is on, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

If the connection to the diagnostic tool is missing, the cause may lie in the control unit or in the wiring to it. Only reading out the fault memory gives a definite answer.

Which vehicles is the 77960-T7S-M610-M2 fitted in?

The control unit 77960-T7S-M610-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

These models are assigned to the part number:

• Honda HR-V 2nd generation (2015-2022)

Compare the part number on the label of the removed unit with this page, then you know that it is the right unit. Whether the control unit is defective or a plug or a cable is the cause is clarified only by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-3V0-A81, 77960-T7S-A21, 77960-T7S-A212-M2, 77960T7SK410M2.

How does the repair of the 77960-T7S-M610-M2 work?

You begin by reading out the fault memory and enclosing the log. Then you disconnect the battery and only then remove the control unit. Afterwards you create the repair order online; Airbag24 needs 3–4 working days for processing.

Pack the removed unit carefully and send it with the repair order to Airbag24. The sequence protects you during removal, so keep to it.

Airbag24 checks the unit on the test bench and repairs defective components. Then Airbag24 erases the crash data and carries out a function test before your own unit is sent 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-T7S-M610-M2 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Enclose the printed repair order in the parcel and pack the control unit shockproof.