Airbag control unit with part number 77960-TR0-K814-M1

What does the airbag control unit 77960-TR0-K814-M1 do?

The airbag control unit 77960-TR0-K814-M1 forms the central control unit of the SRS system of Honda. It evaluates the crash sensors, determines in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If it detects a fault, it indicates this via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself.

Because only fractions of a second remain in a crash, the electronics check their inputs continuously.

Why does the control unit 77960-TR0-K814-M1 fail?

Stored crash data left in the memory after an accident is the most common cause, even without a triggered airbag. A normal diagnostic tool does not erase it. Other causes include aged components, cold solder joints, moisture at connectors and voltage spikes, for example from a weak battery.

Airbag24 erases the crash data during the repair of the unit. This cause is therefore dealt with before the function is tested.

The remaining causes lie in the electronics and their connections.

How can you tell that the 77960-TR0-K814-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there may be a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

The warning light thus reports the fault that the unit itself has detected. Airbags and seatbelt pretensioners may possibly not trigger in an emergency while the defect persists.

Please have the system checked promptly.

Which vehicles is the 77960-TR0-K814-M1 fitted in?

The control unit 77960-TR0-K814-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017). The part number is decisive, not just the model name.

The list shows the vehicles that belong to this part number.

• Honda Civic 9th generation (2011-2017)

You compare the part number on the label with this page on the removed unit. This only shows that you have the right unit. Whether the control unit is defective or connectors or cables are the cause is shown solely by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-TS4-U411-M1, 77960-TS4-U811-M2, 77960-TS4-Z611-M1, 77960-TS6-H711-M1, 77960-TT0-T011-M1, 77960-TT0-Y610-M2.

How does the repair of the 77960-TR0-K814-M1 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery, remove the control unit, create a repair order online and pack the unit carefully.

At Airbag24 the unit received is checked on the test bench. Defective components are replaced, the crash data is erased and a function test is carried out. You then receive your own unit back.

Checking, repairing and testing at Airbag24 usually takes 3–4 working days. 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-TR0-K814-M1 get to Airbag24?

You send the unit as a parcel, or you arrange a UPS collection for an extra charge. The return after the repair is likewise by UPS.

Put the printed repair order into the parcel, and pack the unit so that it is shock-proof.