Airbag control unit with part number 77960-THR-A220-M2

What does the airbag control unit 77960-THR-A220-M2 do?

The airbag control unit 77960-THR-A220-M2 coordinates the restraint system (SRS) for Honda as the central control unit. In an accident it evaluates the sensor signals and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

It also monitors the entire system continuously. If it reports 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 unit working flawlessly, the restraint system may not deploy as intended in an emergency.

Why does the control unit 77960-THR-A220-M2 fail?

The most common cause for the control unit 77960-THR-A220-M2 is crash data stored after an accident, even if no airbag was triggered. Aged components, cold solder joints, moisture and corrosion, and voltage spikes also play a role.

A normal diagnostic tool cannot delete stored crash data. Airbag24 deletes it during the repair, so that the unit works again without this data afterwards.

Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes make up the other causes that can come into consideration for this unit.

How can you tell that the 77960-THR-A220-M2 is defective?

A fault on the 77960-THR-A220-M2 can be recognised by several signs. These include the airbag warning light, error messages and a disturbed data exchange with the diagnostic tool.

The signs in detail:

• airbag warning light in the instrument cluster, permanently or intermittently
• error message in the instrument cluster
• the diagnostic tool cannot establish a connection to the control unit
• the fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy. Therefore take these notices seriously.

Which vehicles is the 77960-THR-A220-M2 fitted in?

The control unit 77960-THR-A220-M2 is intended for Honda. It is fitted in this vehicle: Honda Odyssey 5th generation (from 2013).

For an overview, the list follows:

• Honda Odyssey 5th generation (from 2013)

Compare the part number on the label of the removed unit with this page, so you can see whether it is the right unit. Have the fault memory read out before removal, because only the result shows whether the control unit itself or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-THR-A02, 77960-THR-A03, 77960-TK8-A011-M1, 77960-TK8-D01.

How does the repair of the 77960-THR-A220-M2 work?

For the control unit 77960-THR-A220-M2, 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 take 3–4 working days.

Only now do you 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. Afterwards your own unit is 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-THR-A220-M2 get to Airbag24?

You send the control unit 77960-THR-A220-M2 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.