Airbag control unit with part number 77960-T2F-Y010-M4

What does the airbag control unit 77960-T2F-Y010-M4 do?

The airbag control unit 77960-T2F-Y010-M4 forms the central control unit of the restraint system of Honda. It evaluates the crash sensors and, in an accident, decides within milliseconds whether airbags and seatbelt pretensioners are triggered. After an accident, it locks itself.

The unit continuously checks the connections to all triggers and sensors. A detected fault appears on the airbag warning light in the instrument cluster, and the fault is also stored in the memory.

Why does the control unit 77960-T2F-Y010-M4 fail?

The most common cause is stored crash data after an accident, even if no airbag has triggered. A standard diagnostic tool cannot remove it. Aged electronic components, dry solder joints, moisture, corrosion at plug connections and voltage spikes can also be the cause.

Crash data arises even when the airbags do not fire, and it stays in the unit until it is removed during a repair.

The remaining causes are signs of ageing in the electronics and moisture at the connections. Voltage spikes, for example with a weak battery or a jump-start, additionally stress the components.

How can you tell that the 77960-T2F-Y010-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The signs at a glance:

• airbag warning light lights up permanently or intermittently
• error message in the instrument cluster
• diagnostic tool receives no connection to the control unit
• fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may not trigger in an emergency. Take the warning light seriously and have the system checked.

Which vehicles is the 77960-T2F-Y010-M4 fitted in?

The control unit 77960-T2F-Y010-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

You will find the assignment in the following list.

• Honda Accord 9th generation (2012-2019)

Before removal, compare the part number on the label with this page. This confirms that it is the right unit. Which cause the fault has is shown only by the fault memory read out beforehand, since it reveals whether the control unit is defective or whether a plug or cable is affected.

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-Y010-M4 work?

First read out the fault memory and enclose the log; then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the well-packed unit in. Airbag24 checks, repairs and tests it; processing there usually takes 3–4 working days.

At Airbag24, the unit is checked first, after which defective components are replaced and the crash data is erased. Finally, a function test takes place 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-T2F-Y010-M4 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Place the printed repair order in the parcel and pack the unit shock-proof. After the repair, Airbag24 sends it back by UPS.

A stable packaging with filler material protects the electronics during transport.