Airbag control unit with part number 77960-TM8-E811-M2

What does the airbag control unit 77960-TM8-E811-M2 do?

The airbag control unit 77960-TM8-E811-M2 coordinates the restraint system (SRS) in Honda. It reads the signals from the crash sensors and, in a collision, decides within milliseconds which airbags and seatbelt pretensioners fire.

While driving, the control unit checks the entire system continuously. If it detects a fault, it displays this via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 77960-TM8-E811-M2 fail?

Most often the cause is crash data stored after an accident, even if no airbag was triggered. Further 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 cannot be removed with a standard diagnostic tool. Airbag24 takes care of this step during the repair, and the stored data disappears in the process.

Only reading out the fault memory shows which of these causes is present. Without this diagnosis, it cannot be said with certainty whether the unit itself is affected.

How can you tell that the 77960-TM8-E811-M2 is defective?

A defect shows first on the airbag warning light in the instrument cluster, which lights up permanently or only intermittently. Under some circumstances an error message appears in addition, or the diagnostic tool cannot find the control unit, or the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may fail to trigger in an emergency.

Typical signs at a glance:

• airbag warning light on permanently or intermittently
• error message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory cannot be cleared

If you notice any of these signs, have the system checked promptly. The warning light is therefore the most important signal to watch for.

Which vehicles is the 77960-TM8-E811-M2 fitted in?

The control unit 77960-TM8-E811-M2 is fitted in these vehicles: Honda Insight 2nd generation (2009-2014).

You will find the vehicles for which this part number is recorded in the list below.

• Honda Insight 2nd generation (2009-2014)

Two steps come before the repair. Compare the part number on the label of the removed unit with this page, so that you are sure you have the right unit in front of you. Also have the fault memory read out, because only that result 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-TM8-A01, 77960-TM8-A020-M2, 77960-TM8-A03.

How does the repair of the 77960-TM8-E811-M2 work?

First read out the fault memory and attach the log. Then disconnect the battery, and only after that remove the control unit. Next, create a repair order online and send in the carefully packed unit.

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

Processing at Airbag24 usually takes 3–4 working days, referring solely to inspection, repair and testing.

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-E811-M2 get to Airbag24?

You either hand in the unit as a package, or you arrange a UPS collection for an extra charge. The return after the repair is likewise made by UPS.

Pack the control unit shockproof and enclose the printed repair order.