Airbag control unit with part number 77960-TM8-Q810-M2

What does the airbag control unit 77960-TM8-Q810-M2 do?

The control unit 77960-TM8-Q810-M2 coordinates the restraint system (SRS) of Honda. It processes the signals from the crash sensors continuously and triggers the airbags and seatbelt pretensioners in an emergency.

At the same time, it monitors the entire system and reports faults via the airbag warning light in the instrument cluster. The unit is therefore the monitoring authority of the system.

After an accident, it stores crash data and then locks itself. This behaviour is part of the system's design.

Why does the control unit 77960-TM8-Q810-M2 fail?

The most common cause on the 77960-TM8-Q810-M2 is crash data that remains stored after an accident, even if no airbag has triggered. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be deleted with a standard diagnostic tool. At Airbag24 it is deleted as part of the repair.

Voltage spikes occur, for example, with a weak battery or a jump start. Such loads strain the electronics, even if they do not cause an immediate fault.

How can you tell that the 77960-TM8-Q810-M2 is defective?

On the 77960-TM8-Q810-M2, the airbag warning light in the instrument cluster indicates a defect as soon as it stays on permanently or intermittently. An error message, a lack of contact with the diagnostic tool or a fault memory that cannot be cleared also point to a problem.

The airbag warning light is the most important signal of this system, and it responds to every fault detected. If it stays on or comes back, have the cause checked.

Airbags and seatbelt pretensioners may then fail to trigger, and a warning light that keeps burning must be taken seriously.

Which vehicles is the 77960-TM8-Q810-M2 fitted in?

The control unit 77960-TM8-Q810-M2 is fitted in these vehicles: Honda Insight 2nd generation (2009-2014).

The following list shows the vehicles in which it is installed.

• Honda Insight 2nd generation (2009-2014)

Comparing the part number on the label with this page gives certainty about the right unit. However, it does not prove a cause. Only a fault memory read out beforehand shows whether the control unit itself is affected or a plug or cable.

For the same vehicles, we also repair control units with the part numbers 77960-TM8-A01, 77960-TM8-A020-M2, 77960-TM8-A03.

How does the repair of the 77960-TM8-Q810-M2 work?

Have the fault memory read out and enclose the log before you disconnect the battery. Only then remove the 77960-TM8-Q810-M2, create a repair order online and send in the unit.

Airbag24 examines the unit on the test bench, repairs defective components and carries out a function test. Stored crash data is deleted in the process.

Processing at Airbag24 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-TM8-Q810-M2 get to Airbag24?

You ship the 77960-TM8-Q810-M2 as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Put the printed repair order into the parcel, and pack the control unit shock-proof.