Airbag control unit with part number 77960-T2F-D012-M4

What does the airbag control unit 77960-T2F-D012-M4 do?

The airbag control unit 77960-T2F-D012-M4 coordinates the restraint system (SRS) of Honda. It evaluates the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners to trigger.

It also checks the system for faults continuously and displays them via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. The next section explains what this involves.

Why does the control unit 77960-T2F-D012-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; an ordinary diagnostic tool cannot remove it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Stored crash data remains held in the control unit, even if no airbag has triggered. Only the repair removes it.

Ageing electronics and solder joints that go cold impair function over time. Moisture and corrosion disturb the contact between the unit and the wiring harness.

Voltage spikes, for example with a weak battery or after a jump-start, can also burden the electronics.

How can you tell that the 77960-T2F-D012-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears. Added to this are no connection to the diagnostic tool and a fault memory that cannot be cleared.

Take this warning seriously, as it signals a detected fault in the restraint system. In an emergency, the airbags and seatbelt pretensioners may possibly not deploy.

Have the system checked promptly.

Which vehicles is the 77960-T2F-D012-M4 fitted in?

The 77960-T2F-D012-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

The suitable vehicles for this part number are listed below:

• Honda Accord 9th generation (2012-2019)

Compare the part number on the label of the removed unit with this page to make sure it is the right unit. Also have the fault memory read out beforehand, because the log 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-SEA-G815-M1, 77960-T3L-A012-M1, C0W6K4VDA.

How does the repair of the 77960-T2F-D012-M4 work?

Have the fault memory read out first; the log goes with the unit. Disconnect the battery before removing the control unit. Then create the repair order online. At Airbag24, testing, repairing and checking take 3–4 working days.

Airbag24 examines the unit on the test bench, replaces defective components where necessary, clears the crash data and carries out a function test. Afterwards your own unit comes 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-T2F-D012-M4 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. Airbag24 sends the repaired unit back by UPS. Put the printed repair order in the parcel and pack the control unit shock-resistant.

A suitable packing material prevents the unit from being damaged in transit.