Airbag control unit with part number 77960-TGH-A020-M2

What does the airbag control unit 77960-TGH-A020-M2 do?

The airbag control unit 77960-TGH-A020-M2 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors and decides in an accident, in a split second, which airbags and seatbelt pretensioners are triggered.

It also monitors the entire system continuously. If it detects a fault, it reports it via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself. The airbag warning light is therefore the most important sign you have in the vehicle.

Why does the control unit 77960-TGH-A020-M2 fail?

The most common cause is stored crash data from an accident, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture at plug connections and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

The other causes at a glance:

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

How can you tell that the 77960-TGH-A020-M2 is defective?

A defect shows up as the airbag warning light in the instrument cluster staying on constantly or intermittently. In addition there is a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The warning light shows that something is wrong in the restraint system. In an emergency, airbags and seatbelt pretensioners may then fail to deploy, so a prompt check is advisable.

Which vehicles is the 77960-TGH-A020-M2 fitted in?

The control unit 77960-TGH-A020-M2 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The following overview lists the vehicles for which this unit is on record.

• Honda Civic 10th generation (2015-2022)

Compare the part number on the label of the removed unit with this page; on one hand, that only confirms that it is the right unit. On the other hand, have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-3A2-A810-M2, 77960-3A2-A820-M2, 77960-3A2-A830-M2, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03.

How does the repair of the 77960-TGH-A020-M2 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send the unit off well packed. Processing at Airbag24, including checking, repairing and testing, normally takes 3–4 working days.

This order is mandatory for safety reasons. At Airbag24, the unit is first examined on the test bench, then defective components are repaired, the stored crash data is erased and a function test is carried out. Your own unit then 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-TGH-A020-M2 get to Airbag24?

You have the choice: either you send the control unit 77960-TGH-A020-M2 as a parcel, or you book a UPS collection for an extra charge. Airbag24 handles the return of the repaired unit by UPS.

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