Airbag control unit with part number 77960-T7A-X810-M2

What does the airbag control unit 77960-T7A-X810-M2 do?

The airbag control unit 77960-T7A-X810-M2 manages the restraint system (SRS) for Honda. It evaluates the crash sensors, triggers airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system permanently. After an accident it stores crash data and locks itself.

The unit works in the background and receives measured values continuously. It compares them against fixed criteria and so makes the decision on deployment.

It stores faults and displays them via the airbag warning light in the instrument cluster.

Why does the control unit 77960-T7A-X810-M2 fail?

With the 77960-T7A-X810-M2, the most common cause is crash data stored after an accident, even without deployment. This data cannot be erased with a normal diagnostic tool. Ageing components, moisture and voltage spikes can also cause the failure.

The memory retains the crash data until it is removed during a repair. At Airbag24 this is part of the process.

Independently of this, electronics, solder joints and plug connections can weaken over time. Cold solder joints and corrosion play a role, as do voltage spikes from a weak battery or a jump start.

How can you tell that the 77960-T7A-X810-M2 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-T7A-X810-M2 permanently or intermittently. In addition, an error message appears and the diagnostic tool cannot find the control unit.

For the driver, the light is the first visible sign. Whether it burns constantly or only flickers now and then, both are serious.

If the fault memory cannot be cleared and the connection to the diagnostic tool is lost, the system is faulty. In this case, airbags and seatbelt pretensioners may not deploy in an emergency.

Which vehicles is the 77960-T7A-X810-M2 fitted in?

The 77960-T7A-X810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The matching vehicles are listed below.

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

Before you take the unit out of the vehicle, compare the label with this part number. Have the fault memory read out beforehand to rule out a cable or plug as 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-X810-M2 work?

You read out the fault memory, disconnect the battery and remove the control unit. Then you create a repair order online and send the unit in well packed. At Airbag24, checking, repairing and testing usually take 3–4 working days.

In the Airbag24 test bench, defective components are replaced, the crash data is deleted and the unit is subjected to a function 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-T7A-X810-M2 get to Airbag24?

You send the control unit 77960-T7A-X810-M2 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

The printed repair order and a shock-resistant packaging belong in the parcel.