Airbag control unit with part number 77960-TR0-A222-M1

What does the airbag control unit 77960-TR0-A222-M1 do?

As the central unit, the airbag control unit 77960-TR0-A222-M1 coordinates the SRS restraint system of Honda. From the signals of the crash sensors it calculates within milliseconds in an accident which airbags and seatbelt pretensioners to trigger.

It also checks the components of the system continuously. If it detects a fault, the airbag warning light in the instrument cluster comes on.

After an accident the unit stores crash data and locks itself. Without a functioning control unit, the restraint system may not deploy as intended in an emergency.

Why does the control unit 77960-TR0-A222-M1 fail?

For the control unit 77960-TR0-A222-M1, the most common cause after an accident is stored crash data, even if no airbag was triggered. Ageing, connection problems and voltage fluctuations are also possible causes.

Crash data cannot be deleted with an ordinary diagnostic tool. Airbag24 deletes it during the repair.

• ageing of the electronics
• solder joints that have gone cold
• moisture and rust on connectors
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 77960-TR0-A222-M1 is defective?

On the control unit 77960-TR0-A222-M1 you recognise a fault by the airbag warning light, by an error message in the instrument cluster, by a missing connection of the diagnostic tool, or by a fault memory that cannot be cleared.

Typical signs are:

• airbag warning light in the instrument cluster, permanently or intermittently
• error message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy. Therefore take the warning seriously.

Which vehicles is the 77960-TR0-A222-M1 fitted in?

The airbag control unit 77960-TR0-A222-M1 was built for Honda. It is fitted in this vehicle: Honda Civic 9th generation (2011-2017).

For an overview, the list follows:

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page, so you can be sure you have the right unit. Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-TS4-U411-M1, 77960-TS4-U811-M2, 77960-TS4-Z611-M1, 77960-TS6-H711-M1, 77960-TT0-T011-M1, 77960-TT0-Y610-M2.

How does the repair of the 77960-TR0-A222-M1 work?

For the control unit 77960-TR0-A222-M1, have the fault memory read out and attach the log. Then disconnect the battery and only then remove the unit. Checking, repairing and testing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the unit in, well packed. Airbag24 checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Your own unit is then sent 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-TR0-A222-M1 get to Airbag24?

You send the control unit 77960-TR0-A222-M1 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 belongs in the parcel, and the unit must be packed shock-proof.