Airbag control unit with part number 77960-T7S-P810-M2

What does the airbag control unit 77960-T7S-P810-M2 do?

The airbag control unit 77960-T7S-P810-M2 controls the restraint system (SRS) in Honda. In an accident it evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners to trigger.

A monitoring programme runs in the background and checks the system continuously. Faults detected are indicated via the airbag warning light.

After an accident the unit stores crash data and locks itself. This lock is released only by the repair.

Why does the control unit 77960-T7S-P810-M2 fail?

With the 77960-T7S-P810-M2 the most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion on plugs are also possible causes.

As long as the data is stored, the fault persists. Merely reading it out does not remove the fault, because the data itself is the cause.

Aged electronics, cold solder joints, and moisture and corrosion at the connections count among the other causes. Voltage spikes arise, for example, with a weak battery or a jump start and strain the circuits.

How can you tell that the 77960-T7S-P810-M2 is defective?

The defect in the 77960-T7S-P810-M2 shows up first on the airbag warning light, which lights up in the instrument cluster permanently or intermittently. Added to this are fault messages, a missing connection to the diagnostic tool, and a fault memory that cannot be erased.

In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy. That is the decisive point with this finding.

The light is a message from the system that you should take seriously and have checked promptly.

Which vehicles is the 77960-T7S-P810-M2 fitted in?

The scope covers Honda vehicles. The airbag control unit 77960-T7S-P810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The list shows the models recorded at Airbag24 for this part number:

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

Compare the part number on the unit's label with this page first, because it shows whether it is the correct control unit. Before removal, have the fault memory read out as well. Only the result 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-P810-M2 work?

First the fault memory is read out and the log is enclosed. Then you disconnect the battery and remove the control unit. Next create the repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

You send in the well-packed unit afterwards. You begin the removal only once the battery is disconnected.

Airbag24 checks the unit on the test bench, replaces 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-T7S-P810-M2 get to Airbag24?

You can send the control unit 77960-T7S-P810-M2 as a parcel, or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Put the printed repair order in the parcel. Secure the unit in its packaging so that it is shock-resistant.