Airbag control unit with part number 77960-TV0-E911-M4

What does the airbag control unit 77960-TV0-E911-M4 do?

The airbag control unit 77960-TV0-E911-M4 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. In addition, it monitors the entire system continuously and reports faults via the airbag warning light.

In everyday use the unit works unobtrusively in the background. It continuously checks the connection to sensors, airbags and seatbelt pretensioners, so that every component is ready in an emergency.

After an accident the control unit stores crash data and is locked afterwards.

Why does the control unit 77960-TV0-E911-M4 fail?

The most common cause lies in crash data stored in the 77960-TV0-E911-M4 after an accident, even if no airbag has fired. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The fact that no airbag has fired does not mean that no crash data is held in memory. Airbag24 erases the crash data during repair, so you do not need to take care of this yourself.

Electronic components age over time. Moisture can cause corrosion at plug connectors, and voltage spikes arise, for example, from a weak battery or from a jump start.

How can you tell that the 77960-TV0-E911-M4 is defective?

A defect on the 77960-TV0-E911-M4 shows itself when the airbag warning light in the instrument cluster is permanently or intermittently lit. In addition there may be a fault message in the instrument cluster, no connection to the diagnostic tool, or a fault memory that cannot be erased.

The light reports the fault as soon as the system detects it. If the fault memory cannot be erased, a more detailed check is required.

As long as the fault persists, the airbags and seatbelt pretensioners may not be able to fire in an emergency. Have the system checked promptly for this reason.

Which vehicles is the 77960-TV0-E911-M4 fitted in?

The airbag control unit 77960-TV0-E911-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The vehicles in detail:

• Honda Civic 9th generation (2011-2017)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand as well, because only that shows whether the control unit is defective or whether a plug or 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-TV0-E911-M4 work?

For the repair of the 77960-TV0-E911-M4, first have the fault memory read out and attach the log to the unit. Then disconnect the battery and only afterwards remove the control unit. Online, you create a repair order and send in the well-packed unit.

Airbag24 tests the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. For testing, repairing and checking at Airbag24, expect 3–4 working days as a rule.

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. After that you receive your own unit back.

How does the control unit 77960-TV0-E911-M4 get to Airbag24?

You send the control unit 77960-TV0-E911-M4 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS. The printed repair order goes into the parcel.

Pack the unit shockproof so that it survives transport undamaged.