Airbag control unit with part number 77960-TGG-G010-M4

What does the airbag control unit 77960-TGG-G010-M4 do?

The airbag control unit 77960-TGG-G010-M4 is the control unit of the restraint system (SRS) in Honda vehicles. It processes the readings from the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners to trigger. After an accident it stores crash data and locks itself.

Most of the work happens unseen: the unit continuously checks the circuits of the airbags and seatbelt pretensioners and compares the sensor signals with its specifications. If the electronics detect a fault, they show it via the airbag warning light in the instrument cluster.

Crash data remain stored in the unit after an accident, without any visible change to the control unit.

Why does the control unit 77960-TGG-G010-M4 fail?

Most often the cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or jump-starting.

Crash data are at the start of this chain of causes, because the unit stores them after an accident and they do not disappear afterwards. A diagnostic tool can reach them, but cannot erase them.

Other technical causes come into question as well:

• electronic components that age over time
• cold solder joints inside the unit
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 77960-TGG-G010-M4 is defective?

A defect shows itself when the airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, or the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

Pay particular attention to these signs:

• The airbag warning light in the instrument cluster stays on or keeps coming back on.
• An error message about the airbag system appears in the instrument cluster.
• The diagnostic tool does not connect to the control unit.
• The fault memory cannot be emptied, even after an attempt to clear it.

The warning light therefore signals a finding that should be clarified without delay.

Which vehicles is the 77960-TGG-G010-M4 fitted in?

The 77960-TGG-G010-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

Below you will see the vehicles recorded with this part number.

• Honda Civic 10th generation (2015-2022)

On the one hand you can compare the number on the label of the removed unit with this page to confirm you have the right unit. On the other hand, have the fault memory read out before removal. Only this log shows whether the control unit itself is defective or whether a plug or a 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-TGG-G010-M4 work?

First have the fault memory read out, disconnect the battery and then remove the control unit 77960-TGG-G010-M4; afterwards create a repair order online and send in the unit well packed. Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and tests the function. Processing usually takes 3–4 working days.

The order protects you: removal is only planned after the battery has been disconnected. Pack the unit only after that, so that it is not damaged in transit.

At Airbag24 the unit is first checked, then repaired and tested. Then the 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-TGG-G010-M4 get to Airbag24?

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

Enclose the printed repair order and pack the control unit shock-resistant.