Airbag control unit with part number 77960-TGG-G020-M4

What does the airbag control unit 77960-TGG-G020-M4 do?

The airbag control unit 77960-TGG-G020-M4 controls the SRS restraint system in Honda. It evaluates the signals from the crash sensors, quickly decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the entire system.

If it detects a fault, it creates an entry in the memory and shows it via the airbag warning light. After an accident, the unit stores crash data and locks itself.

Why does the control unit 77960-TGG-G020-M4 fail?

With the 77960-TGG-G020-M4, the most common cause is a quantity of crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. During the repair, Airbag24 removes it.

Ageing is a gradual process. Over the years, components lose reliability, and solder joints can go cold so that the contact wobbles.

Voltage spikes are also among the causes, for example when the battery is weak or a jump-start is bridged. Moisture gets into the plugs and causes corrosion.

How can you tell that the 77960-TGG-G020-M4 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-TGG-G020-M4 permanently or only flickers intermittently. In addition, an error message appears, the diagnostic tool cannot reach the control unit, and the fault memory cannot be emptied.

In an emergency, airbags and seatbelt pretensioners may fail to deploy if there is a defect. This applies regardless of how well the vehicle otherwise runs.

Which vehicles is the 77960-TGG-G020-M4 fitted in?

The part number 77960-TGG-G020-M4 belongs to this vehicle type. The airbag control unit 77960-TGG-G020-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The list of vehicles follows here:

• Honda Civic 10th generation (2015-2022)

First compare the part number on the removed unit with this page, so that you can be sure you have the correct unit. Then have the fault memory read out. This record shows whether the control unit itself or a connection 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-TGG-G020-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit, after which you create the repair order online. Processing the 77960-TGG-G020-M4 at Airbag24 usually takes 3–4 working days.

This order of steps is for your safety. Pack the unit well before you send it in.

At the test bench, Airbag24 examines the unit, repairs defective components, erases the stored crash data and carries out a function test. Afterwards your own unit is 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-TGG-G020-M4 get to Airbag24?

The control unit 77960-TGG-G020-M4 reaches Airbag24 by parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

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