Airbag control unit with part number 77960-TVA-F330-M4

What does the airbag control unit 77960-TVA-F330-M4 do?

The airbag control unit 77960-TVA-F330-M4 coordinates the SRS restraint system of Honda. It processes the measurements from the crash sensors, determines in a collision which airbags and seatbelt pretensioners are triggered, and checks the system continuously during operation. After an accident it stores crash data and locks itself.

The unit registers faults in wiring, sensors and firing circuits and enters them in the fault memory. A fault becomes visible via the airbag warning light in the instrument cluster.

Why does the control unit 77960-TVA-F330-M4 fail?

The most common cause is crash data stored in the control unit 77960-TVA-F330-M4 after an accident, even if no airbag has deployed. Besides crash data, further causes may come into consideration that relate to ageing, moisture and electrical stress.

Crash data record what the unit captured during the event. A standard diagnostic tool cannot erase them.

The further causes include:

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

How can you tell that the 77960-TVA-F330-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as the control unit 77960-TVA-F330-M4 has a defect. In addition, the instrument cluster displays a fault message, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may possibly not deploy.

The warning light is the most important warning sign, because it indicates the fault as soon as the control unit detects it. Have the system checked promptly while the light is on.

The fault message, in turn, says that the restraint system is not fully operational.

Which vehicles is the 77960-TVA-F330-M4 fitted in?

The control unit 77960-TVA-F330-M4 is fitted in these vehicles: Honda Accord 10th generation (2017-2024). The decisive factor here is the make Honda.

The vehicles in the list are those known to us for this part number.

• Honda Accord 10th generation (2017-2024)

Compare the part number on the label of the unit with this page, and you will know whether it is the correct unit. Whether the control unit is defective or a plug or cable is causing the problem only becomes clear from a fault memory read out beforehand. Please have it read out before removal.

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-F330-M4 work?

Airbag24 usually needs 3–4 working days for checking, repairing and testing. Before removal, read out the fault memory and attach the log, then disconnect the battery. Only then remove the control unit 77960-TVA-F330-M4, and send it in after creating a repair order.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and performs a function test before your own unit is returned.

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-F330-M4 get to Airbag24?

You send the control unit 77960-TVA-F330-M4 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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