Airbag control unit with part number 77960-T7S-K810-M2

What does the airbag control unit 77960-T7S-K810-M2 do?

In the Honda the airbag control unit 77960-T7S-K810-M2 controls the restraint system (SRS). It evaluates the crash sensors, determines within milliseconds which airbags and seatbelt pretensioners to trigger, and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

The unit works in the background and continuously checks the connections to the sensors and the triggers.

The seatbelt pretensioners are triggered by the control unit together with the airbags. In a crash, both components are driven in a coordinated way.

Why does the control unit 77960-T7S-K810-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. Other causes are:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

Crash data and defects in the electronics can exist side by side, so a look at the airbags alone is not enough.

How can you tell that the 77960-T7S-K810-M2 is defective?

Typical signs are an airbag warning light that stays on constantly or intermittently, a fault message in the instrument cluster, a diagnostic tool without a connection and a fault memory that cannot be cleared. In that case the airbags and seatbelt pretensioners may not deploy in a crash.

The warning light in the instrument cluster shows the fault immediately, regardless of how well the vehicle runs in everyday use. A fault that the diagnostic tool cannot reach does not necessarily originate in the control unit, since connections can be affected too. Only an inspection will clarify this.

Which vehicles is the 77960-T7S-K810-M2 fitted in?

The control unit 77960-T7S-K810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The list of assigned vehicles follows:

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

If you compare the label of the removed unit with this page, you only know that you have the right unit in front of you. Whether the control unit is defective or a plug or a cable is the cause is shown by the fault memory once it has been read out. So have it 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-K810-M2 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Finally, create a repair order online and send the unit off well packed. At Airbag24 processing usually takes 3–4 working days.

After that, Airbag24 checks the unit, repairs defective components and erases stored crash data. A function test is carried out before return. Then your own unit comes 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-K810-M2 get to Airbag24?

One package is enough; alternatively, UPS will collect the unit for an extra charge. Airbag24 sends the repaired unit back by UPS.

Put the printed repair order into the package and pack the unit shock-proof.