Airbag control unit with part number 77960-T7A-N810-M2

What does the airbag control unit 77960-T7A-N810-M2 do?

The airbag control unit 77960-T7A-N810-M2 is the central control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, the control unit monitors the system throughout operation. If it reports a fault, this appears via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. This storage is a fixed part of the function.

Why does the control unit 77960-T7A-N810-M2 fail?

Stored crash data 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 electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes such as with a weak battery or a jump start.

Crash data cannot be deleted by an ordinary read-out, which is why the fault persists. Only the repair removes these entries.

Ageing, contact problems and moisture belong to the things that creep in over time. Such faults can occur irregularly, alternating between working and not working.

How can you tell that the 77960-T7A-N810-M2 is defective?

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

The warning light is the signal you should heed. As long as it is on, there is a risk that airbags and seatbelt pretensioners may 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. A reliable answer comes only from reading out the fault memory.

Which vehicles is the 77960-T7A-N810-M2 fitted in?

The control unit 77960-T7A-N810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The vehicles assigned to this part number are here:

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

Compare the part number on the label of the removed unit with this page. That only confirms that it is the right unit. Have the fault memory read out beforehand, because only then does it become clear whether the control unit is defective or a plug or cable is the cause.

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-T7A-N810-M2 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only after that remove the control unit. Airbag24 needs 3–4 working days for processing, after you have submitted the repair order.

Create the repair order online and pack the unit well. Keep to the order, as it is prescribed for safety reasons.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Afterwards 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-T7A-N810-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.

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