Airbag control unit with part number 77960-T2A-K030-M4

What does the airbag control unit 77960-T2A-K030-M4 do?

The airbag control unit 77960-T2A-K030-M4 carries out the evaluation of the restraint system (SRS) in Honda. It receives the signals from the crash sensors, decides within milliseconds in a crash about airbags and seatbelt pretensioners, and monitors the system permanently. Detected faults are reported via the airbag warning light.

This monitoring runs constantly in the background. If an accident has occurred, the unit stores crash data and then locks itself.

Why does the control unit 77960-T2A-K030-M4 fail?

Most often the cause lies in stored crash data, even if no airbag was triggered. These data cannot be removed with a standard diagnostic tool. Added to this are aged electronic components, cold solder joints, moisture and corrosion on plug connections, as well as voltage spikes.

A failure can have several causes at once, so the cause is only clear after an examination.

Crash data stays in the unit until it is processed. Gradual causes such as ageing or corrosion slowly change the unit.

How can you tell that the 77960-T2A-K030-M4 is defective?

Signs include the airbag warning light, which lights up permanently or intermittently, an error message in the instrument cluster, a failed connection setup of the diagnostic tool, and a fault memory that cannot be cleared.

The signs in detail:

• Airbag warning light that lights up intermittently or permanently
• Error message in the instrument cluster
• No connection set up between diagnostic tool and control unit
• Fault memory that cannot be cleared

Such findings belong in a prompt examination. In an emergency, airbags and seatbelt pretensioners may not trigger as a result.

Which vehicles is the 77960-T2A-K030-M4 fitted in?

With Honda, this control unit was installed in selected models. The control unit 77960-T2A-K030-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

The list of models reads:

• Honda Accord 9th generation (2012-2019)

If the part number on the label of your removed unit matches this page, you have the correct unit. Have the fault memory read out beforehand, because only its contents show whether the control unit 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-T2A-K030-M4 work?

Before removal, have the fault memory read out and attach the log. Only then disconnect the battery and take out the control unit. Afterwards create the repair order online and pack the unit. Processing at Airbag24 usually takes 3–4 working days.

At the test bench, Airbag24 examines the unit, and defective components are then repaired. Stored crash data is removed before a functional test releases the unit for return.

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-T2A-K030-M4 get to Airbag24?

You can either send the unit as a parcel or arrange a UPS collection for an extra charge. After the repair Airbag24 sends the unit back by UPS.

The printed repair order is enclosed in the parcel, and the packaging protects the control unit from impacts.