Airbag control unit with part number 77960-TFM-W610-M4

What does the airbag control unit 77960-TFM-W610-M4 do?

The airbag control unit 77960-TFM-W610-M4 belongs to the restraint system (SRS) of the Honda. It evaluates sensor signals, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It indicates faults via the airbag warning light in the instrument cluster, so the fault is visible to you.

After an accident the control unit stores crash data and locks itself. The term SRS control unit refers to the same component.

Why does the control unit 77960-TFM-W610-M4 fail?

The most common cause is that crash data is stored in the unit after an accident, even if no airbag has deployed. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A standard diagnostic tool cannot remove this crash data. Airbag24 removes it as part of the repair.

The remaining causes relate to ageing and moisture. Electronic components age, solder joints can be cold, and plug connections take up moisture, which leads to corrosion. Voltage spikes, for example from a weak battery or a jump start, additionally stress the control unit.

How can you tell that the 77960-TFM-W610-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, the instrument cluster shows a fault message, the diagnostic tool cannot find the control unit, and the fault memory cannot be cleared.

The light alone does not say what the cause is, but it is the clear sign that the restraint system needs to be checked.

If it is lit, airbags and seatbelt pretensioners may fail to deploy in an emergency.

Which vehicles is the 77960-TFM-W610-M4 fitted in?

The 77960-TFM-W610-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

This list shows the vehicles that have this control unit:

• Honda Civic 10th generation (2015-2022)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Have the fault memory read out, because only that 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-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-TFM-W610-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit 77960-TFM-W610-M4, and afterwards create a repair order online.

Pack the unit well before it is sent.

Airbag24 checks the unit on the test bench, replaces defective components and erases the stored crash data. The team then carries out a function test. Processing at Airbag24 usually takes 3–4 working days. Your own unit is then sent 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-TFM-W610-M4 get to Airbag24?

You send the control unit 77960-TFM-W610-M4 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.