Airbag control unit with part number 77960-T70-H220-M2

What does the airbag control unit 77960-T70-H220-M2 do?

The airbag control unit 77960-T70-H220-M2 is the central control unit of the restraint system (SRS) of Honda. It processes the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered. It shows detected faults via the airbag warning light.

Monitoring takes place continuously while the vehicle is in operation. Faulty states are stored in the fault memory and can be read out with a diagnostic tool.

After an accident the unit stores crash data and locks itself.

Why does the control unit 77960-T70-H220-M2 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the unit, and a standard diagnostic tool cannot delete it. A simple reset therefore offers no solution.

The other causes can lie in the electronics or the contacts. Solder joints can go cold, moisture and corrosion attack the plug connections, and voltage spikes, for example from a jump start, stress the components.

How can you tell that the 77960-T70-H220-M2 is defective?

A defect shows itself through one or more of the features listed. In these cases, airbags and seatbelt pretensioners may fail to deploy in an emergency.

• The airbag warning light lights up permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool cannot connect to the control unit.
• The fault memory cannot be cleared.

The warning light shows the defect itself. It is therefore the first warning sign you will notice.

Only the fault memory clarifies whether the control unit is defective. A plug or a cable can trigger similar messages.

Which vehicles is the 77960-T70-H220-M2 fitted in?

Compare your vehicle with the details in the list. The control unit 77960-T70-H220-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The vehicles to which this part number applies are listed here:

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

You can compare the part number on the label of the removed unit with this page. That only establishes that it is the correct unit. Also have the fault memory read out before removal, because only that shows whether the control unit is defective or 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-T70-H220-M2 work?

For the control unit 77960-T70-H220-M2, first have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Next, create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench and repairs defective components. It then deletes the stored crash data and carries out a function test. After that, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days.

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-T70-H220-M2 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns the control unit 77960-T70-H220-M2 to you by UPS.

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