Airbag control unit with part number 77960-T90-A210-M1

What does the airbag control unit 77960-T90-A210-M1 do?

The control unit 77960-T90-A210-M1 is the airbag control unit of the restraint system (SRS) in Honda. It evaluates the signals from the crash sensors and decides within milliseconds whether airbags and seatbelt pretensioners fire. After a crash it stores crash data and locks itself.

The system checks itself continuously. If it detects a fault, it reports it via the airbag warning light in the instrument cluster, so that you can respond.

Why does the control unit 77960-T90-A210-M1 fail?

Stored crash data is most often behind a fault, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes come on top.

A normal diagnostic tool cannot delete the crash data. Airbag24 takes care of the deletion as part of the repair.

The other causes lie in the everyday life of the electronics: components age, solder joints can be cold, and moisture and corrosion attack the plug connections.

Voltage spikes also belong here, for example when a battery is weak or a jump start was needed.

How can you tell that the 77960-T90-A210-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as the system detects something. An error message may also appear in the instrument cluster, or the diagnostic tool finds no connection. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Start by looking at the warning light after switching on the ignition. If it does not go out afterwards, there is a fault that must be checked.

If the fault memory is still occupied after it has been read out, this helps to narrow down the cause. A fault memory that cannot be cleared is a finding that must be investigated.

Which vehicles is the 77960-T90-A210-M1 fitted in?

This 77960-T90-A210-M1 control unit is fitted at Honda in these vehicles: Honda Pilot 4th generation (from 2022). Before you remove anything, clarify whether your car is on this list.

The vehicles at a glance:

• Honda Pilot 4th generation (from 2022)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Having the fault memory read out shows whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the 77960-T90-A210-M1 work?

First have the fault memory read out and the log attached, then disconnect the battery and remove the control unit. Next, create the repair order online and send the well-packed unit. At Airbag24 processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. These 3–4 working days cover only this work, not the steps you take beforehand.

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-T90-A210-M1 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

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