Airbag control unit with part number 77960-T0A-Y812-M1

What does the airbag control unit 77960-T0A-Y812-M1 do?

The airbag control unit 77960-T0A-Y812-M1 is the point in the restraint system (SRS) of Honda where all sensor data converges. It evaluates the crash sensors, determines within milliseconds which airbags and seatbelt pretensioners fire, and checks the system constantly.

The unit detects faults itself and shows them via the airbag warning light.

An accident leaves crash data in the unit, and after that the unit is locked.

Why does the control unit 77960-T0A-Y812-M1 fail?

The most common cause is crash data that stays stored after an accident, even without a triggered airbag, and that cannot be erased with an ordinary diagnostic tool. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data record the event and remain in the unit until Airbag24 erases them during the repair.

The other causes act independently of an accident and hardly show at first, until a contact fails.

Voltage spikes arise, for example, when the battery is weak or a jump start is carried out.

How can you tell that the 77960-T0A-Y812-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The light comes on as soon as the system registers a fault, and so it indicates the defect.

If you see this indication, a check is the next sensible step.

Which vehicles is the 77960-T0A-Y812-M1 fitted in?

The 77960-T0A-Y812-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The known vehicles are listed here:

• Honda CR-V 4 RM (2012-2018)

With the unit removed, first compare the label with this page. That tells you the unit belongs to this part number. The fault memory must be read out before you judge 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 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T0A-Y812-M1 work?

The fault memory is read out first and the log is enclosed before the battery is disconnected and the control unit is removed. You then create a repair order online and send the unit in well packed. At Airbag24 you should generally allow 3–4 working days for checking, repairing and testing.

Airbag24 checks the unit on the test bench, replaces defective components, erases crash data and carries out a function test. Finally, your own unit is sent back.

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-T0A-Y812-M1 get to Airbag24?

Either you send the control unit as a parcel, or you arrange a UPS collection for an extra charge. The return after repair is handled by UPS on behalf of Airbag24.

The printed repair order goes into the parcel, and the unit needs a shock-resistant case.