Airbag control unit with part number 77960-TS8-K030-M4

What does the airbag control unit 77960-TS8-K030-M4 do?

The airbag control unit 77960-TS8-K030-M4 is the central control unit of the SRS for Honda. It processes the signals from the crash sensors, decides in an accident whether to trigger, and monitors the entire system. After an accident it stores crash data and locks itself.

Without this unit there would be no coordinated triggering of the airbags and seatbelt pretensioners.

Its feedback runs via the airbag warning light in the instrument cluster.

Why does the control unit 77960-TS8-K030-M4 fail?

The most common cause with the 77960-TS8-K030-M4 is stored crash data after an accident, even if no airbag has triggered; an ordinary diagnostic tool cannot delete it. Added to this are several ageing and moisture causes that weaken the electronics.

Further causes in detail:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump start

Which of these applies is shown by testing the removed device. The crash data is always the first point.

How can you tell that the 77960-TS8-K030-M4 is defective?

The airbag warning light, which stays on permanently or intermittently, is the clearest sign of a defect. An error message in the instrument cluster is added. If the diagnostic tool cannot reach the control unit or the fault memory cannot be cleared, that also indicates a problem. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

The light shows that the system has noticed something. Which component is affected is clarified by reading out the fault memory.

A diagnostic tool without a connection alone does not say where the fault is. The cause may lie in the control unit or in the associated wiring.

Which vehicles is the 77960-TS8-K030-M4 fitted in?

The airbag control unit 77960-TS8-K030-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017). The assignment helps with comparing against your own vehicle.

Here follows the list of vehicles:

• Honda Civic 9th generation (2011-2017)

Comparing the part number on the label of the removed device with this page only confirms the identity of the device. Having the fault memory read before you remove the control unit, on the other hand, clarifies whether the control unit itself or a plug is the cause.

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-TS8-K030-M4 work?

Before removal, the fault memory is read out, and you attach its log. Then you disconnect the battery. Next, you remove the control unit 77960-TS8-K030-M4 and create the repair order online.

Airbag24 checks the device on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Afterwards your own device comes back to you.

The processing time at Airbag24 is usually 3–4 working days and covers only the work in-house.

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-TS8-K030-M4 get to Airbag24?

Shipping is by parcel to Airbag24, or by a UPS collection booked for an extra charge. After the repair, Airbag24 sends the control unit 77960-TS8-K030-M4 back by UPS.

Pack the printed repair order into the parcel and the device shockproof.