Airbag control unit with part number 77960-TGG-J410-M4

What does the airbag control unit 77960-TGG-J410-M4 do?

The airbag control unit 77960-TGG-J410-M4 controls the restraint system (SRS) of Honda. It processes the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

The unit monitors the system throughout the whole journey and checks the connected components. Faults found are stored in the fault memory, which a diagnostic tool can read out later.

After an accident the unit stores crash data and locks itself. This also applies to accidents in which no airbag was deployed.

Why does the control unit 77960-TGG-J410-M4 fail?

The most common cause is stored crash data after an accident, even if no airbag deployed. Other causes to consider are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data cannot be erased with a standard diagnostic tool. If you notice faults after an accident, look at this data first.

The other causes develop more gradually: electronic components age, solder joints change, and moisture can cause corrosion at plug connections. Voltage spikes, for example from jump-starting, occur suddenly.

How can you tell that the 77960-TGG-J410-M4 is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently, a fault message in the instrument cluster, no connection to the diagnostic tool, or a fault memory that cannot be cleared.

If you notice any of these signs, airbags and seatbelt pretensioners may fail to deploy in an emergency. Have the cause clarified promptly rather than carrying on as if nothing had happened.

Which vehicles is the 77960-TGG-J410-M4 fitted in?

The 77960-TGG-J410-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022). The list serves as an initial guide before you remove a unit.

The following overview names the vehicles on record for this part number:

• Honda Civic 10th generation (2015-2022)

Before removal, compare the part number on the label of the unit with this page. That only confirms that you have the right unit. Have the fault memory read out, 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-TGG-J410-M4 work?

First have the fault memory read out and enclose the log with the unit, then disconnect the battery and only then remove the control unit. Next create a repair order online and send the unit in well packed. At Airbag24 processing usually takes 3–4 working days.

At Airbag24 the unit is first examined on the test bench. Defective components are replaced, stored crash data is erased and a functional test is run before the unit goes back.

Checking, repairing and testing at Airbag24 usually take 3–4 working days; this time applies only to that work. You then receive your own, repaired unit back.

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-J410-M4 get to Airbag24?

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

Enclose the printed repair order with the parcel. Pack the control unit shock-resistant.