Airbag control unit with part number 77960-TV8-G911-M4

What does the airbag control unit 77960-TV8-G911-M4 do?

The airbag control unit 77960-TV8-G911-M4 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors, determines in an emergency within fractions of a second the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. It shows detected faults via the airbag warning light.

Monitoring takes place throughout operation. The unit checks sensors, wiring and trigger circuits and evaluates their condition continuously.

After an accident it stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 77960-TV8-G911-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot clear it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

Crash data arises as soon as the unit registers an accident, regardless of whether an airbag has triggered. It stays in the memory until the repair removes it, and a diagnostic tool does not reach it.

The other causes concern the electronics. Components age, solder joints can go cold, and moisture or corrosion at plug connectors disturbs signal transmission. Voltage spikes also load the circuit.

How can you tell that the 77960-TV8-G911-M4 is defective?

A defect shows as an airbag warning light in the instrument cluster that lights permanently or intermittently, as an error message there, as a diagnostic tool without connection to the control unit, and as a fault memory that cannot be cleared.

The airbag warning light in the instrument cluster lights permanently or intermittently as soon as the system has detected a fault. An error message in the instrument cluster may appear alongside it. If the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared, that also points to a fault. In these cases, airbags and seatbelt pretensioners may not be able to trigger in an emergency.

Which vehicles is the 77960-TV8-G911-M4 fitted in?

The control unit 77960-TV8-G911-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

Here are the vehicles for which this control unit is listed:

• Honda Civic 9th generation (2011-2017)

Comparing the part number on the label of the removed unit with this page ensures that you have the matching unit in front of you. It does not show what triggers the fault. Therefore have the fault memory read out beforehand, because this log shows whether the control unit is defective or whether a plug or a cable 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-TV8-G911-M4 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next create a repair order online and send the unit in well packed.

At Airbag24 the team tests the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Processing usually takes 3–4 working days. Afterwards your own unit is returned to you.

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-TV8-G911-M4 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS. Put the printed repair order into the parcel, and the unit is packed shockproof.

A stable packaging protects the control unit on the way to Airbag24 and back again.