Airbag control unit with part number 77960-TVA-H230-M4

What does the airbag control unit 77960-TVA-H230-M4 do?

77960-TVA-H230-M4 controls the restraint system of Honda as an SRS control unit. It checks the connected sensors, selects within milliseconds in a crash which airbags and seatbelt pretensioners should deploy, and shows detected faults via the airbag warning light.

The unit monitors the system without interruption, not only at the moment of an impact. After an accident it stores crash data and locks itself; only a repair lifts this lock.

Why does the control unit 77960-TVA-H230-M4 fail?

Stored crash data from an earlier accident is the most common cause, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. In addition there are aged electronics, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

Voltage spikes arise for instance from a weak battery or from jump-starting. Such influences can damage the electronics, and corrosion further worsens the contact in the plug connections.

Airbag24 erases the crash data as part of the repair. Which of the other causes is present is determined by the check.

How can you tell that the 77960-TVA-H230-M4 is defective?

The airbag warning light in the instrument cluster lights up constantly or at times, a fault message appears in the instrument cluster, the diagnostic tool cannot find the control unit, or the fault memory cannot be cleared. With these signs, airbags and seatbelt pretensioners may fail to deploy in an emergency.

The light is therefore a clear indication of a fault in the system.

If this indication appears, have the system examined promptly.

Which vehicles is the 77960-TVA-H230-M4 fitted in?

The 77960-TVA-H230-M4 is fitted in these vehicles: Honda Accord 10th generation (2017-2024). Check with a look at the list on this page whether your model is among them.

In the Airbag24 stock the following vehicles are listed for this number:

• Honda Accord 10th generation (2017-2024)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. Also have the fault memory read out before removal, because only this result reveals 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-T3L-A012-M1, 77960-T3L-C012-M4, 77960-T3L-C020-M4, 77960-T3L-C030-M4, 77960-T3L-F012-M4, 77960-T3L-F020-M4.

How does the repair of the 77960-TVA-H230-M4 work?

First have the fault memory read out and place the log in the parcel. Then disconnect the battery, and only after that remove the control unit from the vehicle. Next, create the repair order online and send the unit packed.

At Airbag24 the unit is checked, defective components are repaired and stored crash data is erased. Finally a function test follows, after which your unit goes back to you.

At Airbag24, testing, repairing and checking usually take 3–4 working days. 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-TVA-H230-M4 get to Airbag24?

You ship the unit as a parcel, or you book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

Pack the control unit shock-proof and include the printed repair order.