Airbag control unit with part number 77960-TV0-G920-M4

What does the airbag control unit 77960-TV0-G920-M4 do?

The airbag control unit 77960-TV0-G920-M4 controls the restraint system (SRS) in Honda. It processes the measured values of the crash sensors and in an accident triggers the appropriate airbags and seatbelt pretensioners within milliseconds. After an accident it stores crash data and locks itself; this lock ends only with the repair.

In operation the unit checks all connected components. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

This is where the function of the entire system comes together.

Why does the control unit 77960-TV0-G920-M4 fail?

Most often the cause is crash data that remains in memory after an accident, even if no airbag has deployed. An ordinary diagnostic tool cannot erase it. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example with a weak battery or a jump start.

An accident does not have to have led to an airbag deployment for this.

The other causes develop over time. Components weaken, solder joints crack, and moisture lets contacts corrode.

Voltage spikes occur when the vehicle electrical system is weak or a jump start is needed.

How can you tell that the 77960-TV0-G920-M4 is defective?

A defect on the 77960-TV0-G920-M4 is noticed first at the airbag warning light in the instrument cluster, which lights up permanently or intermittently. A fault message in the instrument cluster may appear in addition.

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

Such signs mean that airbags and seatbelt pretensioners may not deploy in an emergency. A prompt check creates clarity.

Which vehicles is the 77960-TV0-G920-M4 fitted in?

The unit with the number 77960-TV0-G920-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The overview follows here:

• Honda Civic 9th generation (2011-2017)

First compare the part number on the label with this page; this only confirms the correct unit. In addition, have the fault memory read out before removal, because this record shows whether the control unit is defective or 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-G920-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery from the mains and afterwards remove the control unit. Now create the repair order online and send the unit in securely packed.

Airbag24 examines the unit you send on the test bench, repairs defective components, erases stored crash data and carries out a function test. Only then is the unit returned to you.

Processing at us usually takes 3–4 working days.

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-TV0-G920-M4 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. The return after the repair is also made by UPS.

Pack the printed repair order into the parcel. Pack the control unit shock-proof.