Airbag control unit with part number 77960-TM8-E820-M2

What does the airbag control unit 77960-TM8-E820-M2 do?

The airbag control unit 77960-TM8-E820-M2 controls the restraint system (SRS) in Honda vehicles. In an accident it decides on the triggering of the airbags and seatbelt pretensioners, evaluates the sensors for this purpose and monitors the system. After an accident it stores crash data and locks itself.

The unit reports faults via the airbag warning light in the instrument cluster. Such a message is the indication that the system needs to be checked.

Why does the control unit 77960-TM8-E820-M2 fail?

Crash data stored in the unit after an accident are the most common cause, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture on connectors and voltage spikes are also involved.

A normal diagnostic tool cannot erase this data. The fault therefore remains stored.

Besides crash data, old components, cold solder joints and moisture on connectors also count. Voltage spikes caused by a weak battery or a jump-start are possible as well.

How can you tell that the 77960-TM8-E820-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when the 77960-TM8-E820-M2 has a defect. Fault messages, a missing contact from the diagnostic tool and a fault memory that cannot be cleared are added to this.

As long as the defect persists, airbags and seatbelt pretensioners may fail to deploy in an emergency. Please have the system checked.

Which vehicles is the 77960-TM8-E820-M2 fitted in?

The control unit 77960-TM8-E820-M2 is fitted in the following model: Honda Insight 2nd generation (2009-2014).

Here is an overview of the model:

• Honda Insight 2nd generation (2009-2014)

Matching the number on the label with this page only confirms that you have the right unit in front of you. Whether the control unit is defective or a connector or cable is the cause is shown 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-TM8-A01, 77960-TM8-A020-M2, 77960-TM8-A03.

How does the repair of the 77960-TM8-E820-M2 work?

You read out the fault memory beforehand and attach the log. Then you disconnect the battery, and only then remove the control unit 77960-TM8-E820-M2. Afterwards you create a repair order online and pack the unit well.

At Airbag24 the unit is examined, defective components are replaced, crash data are erased and the function is finally tested. Examining, repairing and testing at Airbag24 usually take 3–4 working days. Then your own unit is returned.

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-E820-M2 get to Airbag24?

You send the control unit 77960-TM8-E820-M2 to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return of the repaired unit is handled by UPS.

For transport both matter: shock-proof packaging and the printed repair order in the parcel.