Airbag control unit with part number 77960-T7S-Q810-M2

What does the airbag control unit 77960-T7S-Q810-M2 do?

As the central airbag control unit, the 77960-T7S-Q810-M2 controls the restraint system (SRS) of Honda. It checks the crash sensors, determines in a collision which airbags and seatbelt pretensioners are triggered, and keeps running throughout.

If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

In the event of an accident, the control unit stores crash data and locks itself.

Why does the control unit 77960-T7S-Q810-M2 fail?

The most common cause with the 77960-T7S-Q810-M2 is crash data stored after an accident, even where no airbag has deployed. Ageing electronics, cold solder joints, moisture at the plug connectors and voltage spikes also play a part.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 erases it as part of the repair.

Electronic components age, and solder joints can go cold. In addition, moisture and corrosion affect plug connections.

Voltage spikes from the vehicle electrical system, for example with a weak battery or jump starting, put additional strain on the unit.

How can you tell that the 77960-T7S-Q810-M2 is defective?

On the 77960-T7S-Q810-M2, the airbag warning light in the instrument cluster lights up permanently or intermittently if there is a fault. Fault messages, a diagnostic tool with no connection to the control unit, or a fault memory that cannot be cleared may also appear. In that case, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the clearest sign on the vehicle and calls for a check.

A disrupted data exchange with the diagnostic tool does not necessarily mean the control unit itself is faulty, as cables may also be affected.

Which vehicles is the 77960-T7S-Q810-M2 fitted in?

The 77960-T7S-Q810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022). This assignment describes the unit and is not evidence of the condition of an individual vehicle.

The overview of the vehicles concerned is shown here as a list.

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

Firstly, compare the part number on the label of the removed unit with this page, which only confirms that you have the right unit. Secondly, have the fault memory read out before removal, because only the log 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 77960-3V0-A81, 77960-T7S-A21, 77960-T7S-A212-M2, 77960T7SK410M2.

How does the repair of the 77960-T7S-Q810-M2 work?

First, have the fault memory read out and attach the log, then disconnect the battery; only then remove the control unit. Create the repair order online, then send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

On the test bench, Airbag24 checks the unit, repairs defective components, erases crash data and carries out a functional test.

Your own unit is then returned 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-Q810-M2 get to Airbag24?

You send the 77960-T7S-Q810-M2 in as a parcel or, for an extra charge, book a UPS collection. After the repair, Airbag24 returns the unit to you by UPS.

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