Airbag control unit with part number 77960-3V0-K620-M2

What does the airbag control unit 77960-3V0-K620-M2 do?

The airbag control unit 77960-3V0-K620-M2 forms the evaluation point for the crash sensors in the restraint system (SRS) of Honda. Within milliseconds it decides in a collision which airbags and seatbelt pretensioners are triggered, and it checks the system without interruption. It indicates faults via the airbag warning light.

After an accident it stores crash data in its memory and locks itself.

The unit only shows itself in an emergency, but it works along the whole time.

Why does the control unit 77960-3V0-K620-M2 fail?

Crash data from an accident is the most common cause, even if no airbag has deployed. Other causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

An ordinary diagnostic tool is not able to remove this crash data.

Voltage spikes occur, for example, with a weak battery or when a jump start is connected. Aged components and damp contacts, on the other hand, are causes that develop slowly.

How can you tell that the 77960-3V0-K620-M2 is defective?

Typical signs are an airbag warning light that lights up permanently or from time to time, and an error message in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory remains. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

The warning light reflects the state of the system and deserves your attention.

A defect is therefore indicated, and that is exactly why the check is the next step.

Which vehicles is the 77960-3V0-K620-M2 fitted in?

The 77960-3V0-K620-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The vehicles for this part number are listed here:

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

You compare the part number on the label of the removed unit with this page; that confirms that it is the correct unit. Have the fault memory read out before removal. Only this reading shows the actual cause and separates a defective control unit from a plug or cable problem.

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 77960-3V0-K620-M2 work?

First have the fault memory read out and enclose the log with the unit. In the next step you disconnect the battery and remove the control unit. Then you create the repair order online and send the well-packed unit. Airbag24 usually processes it within 3–4 working days, checks it on the test bench, replaces defective components, deletes crash data and carries out a function test.

The sequence is fixed for safety reasons.

The 3–4 working days refer solely to the work at Airbag24, not to your steps or the shipping.

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 77960-3V0-K620-M2 get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair your own unit comes back to you by UPS.

Pack the unit shockproof and enclose the printed repair order.