Airbag control unit with part number 77960-TT2-F411-M1

What does the airbag control unit 77960-TT2-F411-M1 do?

The airbag control unit 77960-TT2-F411-M1 controls the restraint system (SRS) for Honda. It evaluates the crash sensors, decides in an accident within milliseconds on the triggering of the airbags and seatbelt pretensioners, and monitors the system continuously.

The unit shows detected faults via the airbag warning light in the instrument cluster. In this way the driver notices a defect in the restraint system.

After an accident, it stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 77960-TT2-F411-M1 fail?

The most common cause is crash data stored after an accident, even without a deployed airbag. A normal diagnostic tool cannot erase it. Further causes include ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 erases the crash data during the repair. An intervention with the diagnostic tool is not enough for this.

Ageing components and cold solder joints lead to contact problems over time. Moisture and corrosion at plug connections, and voltage spikes from a weak battery or a jump start, can cause further trouble.

How can you tell that the 77960-TT2-F411-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

The light is the warning you should not ignore. As long as it is active, airbags and seatbelt pretensioners may not be able to deploy in an emergency.

Which cause lies behind the signs cannot be reliably derived from them alone. Reading out the fault memory provides clarity.

Which vehicles is the 77960-TT2-F411-M1 fitted in?

The 77960-TT2-F411-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

We list these vehicles for this part number:

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page. This only establishes that it is the right unit.

Have the fault memory read out in advance. Only the 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-S02-A840-M3, 77960-SMG-G120-M1, 77960-TV0-G020-M4.

How does the repair of the 77960-TT2-F411-M1 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the unit in good packaging. Airbag24 checks it on the test bench, replaces defective components, erases the crash data and carries out a functional test.

The period covers only checking, repairing and testing. Removal, reading out and shipping are not included. Your own unit is then returned 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-TT2-F411-M1 get to Airbag24?

You send the device as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the device to you by UPS.

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