Airbag control unit with part number 77960-THR-A320-M2

What does the airbag control unit 77960-THR-A320-M2 do?

The airbag control unit 77960-THR-A320-M2 acts as the central unit controlling the restraint system (SRS) of Honda. It reads the crash sensors, determines within a few milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The monitoring runs in the background while the vehicle is in use. If the unit detects a fault, it reports it to the airbag warning light in the instrument cluster, which the driver then sees.

Why does the control unit 77960-THR-A320-M2 fail?

The most common cause: crash data stored after an accident, even if no airbag has deployed, because a normal diagnostic tool cannot erase it. Airbag24 erases it during the repair; other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

Which cause applies in an individual case is shown only by reading the fault memory together with the examination at Airbag24.

How can you tell that the 77960-THR-A320-M2 is defective?

The airbag warning light in the instrument cluster stays on constantly or comes on intermittently, and a message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Note whether the light only comes on when starting or stays on permanently, and which message appears in the instrument cluster.

Which vehicles is the 77960-THR-A320-M2 fitted in?

The control unit 77960-THR-A320-M2 is fitted in these vehicles: Honda Odyssey 5th generation (from 2013).

Below you will find the vehicles assigned to this part number.

• Honda Odyssey 5th generation (from 2013)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Have the fault memory read out beforehand, because only this log 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-THR-A02, 77960-THR-A03, 77960-TK8-A011-M1, 77960-TK8-D01.

How does the repair of the 77960-THR-A320-M2 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit; after that create a repair order online.

Send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days, and this time covers only checking, repairing and testing there.

Airbag24 checks the unit on the test bench, replaces defective components, erases the 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-THR-A320-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 it to you by UPS.

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