Airbag control unit with part number 77960-THR-A110-M2

What does the airbag control unit 77960-THR-A110-M2 do?

The airbag control unit 77960-THR-A110-M2 is responsible for the restraint system (SRS) in Honda. It evaluates the signals from the crash sensors and controls which airbags and seatbelt pretensioners fire in a crash. The decision takes only milliseconds. It also monitors the system continuously and reports faults via the airbag warning light.

In operation, it checks sensors, wiring and triggers and stores any faults in memory.

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

Why does the control unit 77960-THR-A110-M2 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data; Airbag24 erases it during the repair. Aged components, moisture and voltage spikes also come into consideration as causes.

Crash data are the result of a registered event. A deployed airbag is not required for that.

Aged components lose reliability over time, and cold solder joints can cause contact problems.

Moisture and corrosion at plug connections, as well as voltage spikes, for example from jump starting or a weak battery, complete the picture.

How can you tell that the 77960-THR-A110-M2 is defective?

The airbag warning light stays on permanently or only intermittently, and an error message appears in the instrument cluster. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The signs at a glance:

• airbag warning light on, permanently or intermittently
• error message in the instrument cluster
• diagnostic tool without connection
• fault memory cannot be cleared

A check brings clarity as soon as these signs appear.

Which vehicles is the 77960-THR-A110-M2 fitted in?

The control unit 77960-THR-A110-M2 is fitted in this vehicle: Honda Odyssey 5th generation (from 2013). The vehicle registration document and the year of manufacture help with the comparison.

The vehicle details are listed here:

• Honda Odyssey 5th generation (from 2013)

Compare the part number on the label of the unit with this page; that only confirms you have the right unit. The fault memory is read out before removal, because only this result shows whether the control unit itself is defective or 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-A110-M2 work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, have the fault memory read out, enclose the log and disconnect the battery. Only then remove the control unit and create a repair order online. You send in the well-packed unit, and Airbag24 then carries out the check on the test bench, replaces defective components, erases the crash data and runs a function test.

This period covers only the check, the repair and the test at Airbag24.

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-THR-A110-M2 get to Airbag24?

You choose the shipping method: a parcel, or a UPS collection booked for an extra charge. The return after repair follows by UPS. Put the printed repair order into the parcel and pack the unit shockproof.

A shockproof casing of cardboard and filling material protects the unit.