Airbag control unit with part number 77960-TV8-E911-M4

What does the airbag control unit 77960-TV8-E911-M4 do?

The airbag control unit 77960-TV8-E911-M4 evaluates the signals from the crash sensors on Honda. In the event of an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered, and it monitors the restraint system (SRS) continuously. After an accident it stores crash data and locks itself.

It indicates faults via the airbag warning light.

This is precisely why the control unit is central to the function of the entire system.

Why does the control unit 77960-TV8-E911-M4 fail?

The most common cause on the 77960-TV8-E911-M4 is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot delete it. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. Airbag24 deletes the crash data during repair.

Crash data is created even in accidents where no airbag has triggered, because the unit logs the event itself.

The remaining causes lie in components, solder joints and connections. Voltage spikes occur, for example, with a weak battery or a jump start.

How can you tell that the 77960-TV8-E911-M4 is defective?

A defect in the 77960-TV8-E911-M4 can be recognised by several signs. The airbag warning light in the instrument cluster lights up permanently or intermittently. In that case the airbags and seatbelt pretensioners may not trigger in an emergency.

The individual signs are as follows:

• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory that cannot be cleared
• Airbag warning light that lights up permanently or intermittently

Any one of these signs justifies a check, even if the others are absent.

Which vehicles is the 77960-TV8-E911-M4 fitted in?

The control unit 77960-TV8-E911-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017). This assignment applies to the stated part number.

The vehicles are listed below:

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit to confirm that it is the correct unit. Whether the control unit is defective or a plug or a cable is the cause is clarified only by the fault memory, which you 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-TV8-E911-M4 work?

You first have the fault memory read out and enclose the log. Then you disconnect the battery before removing the 77960-TV8-E911-M4. Online you create the repair order and send in the well-packed unit. For processing at Airbag24, allow 3–4 working days as a rule.

At Airbag24 the unit is checked on the test bench, defective components are replaced and stored crash data is deleted. Finally a function test follows, and then 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-E911-M4 get to Airbag24?

You send the control unit 77960-TV8-E911-M4 as a parcel or arrange a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

The printed repair order goes into the parcel, and the unit is packed shock-proof.