Airbag control unit with part number 77960-3A0-F620-M2

What does the airbag control unit 77960-3A0-F620-M2 do?

The airbag control unit 77960-3A0-F620-M2 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors, decides on the triggering of airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the system continuously.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. In this way, you notice in everyday driving that something is wrong in the restraint system.

After a crash, the control unit stores crash data and locks itself. It thus controls the airbags and seatbelt pretensioners that must trigger in an emergency.

Why does the control unit 77960-3A0-F620-M2 fail?

The most common cause is stored crash data after a crash, even if no airbag has deployed. Airbag24 erases it during the repair, because a normal diagnostic tool cannot erase it. Further causes are aged electronic components, solder joints, plug connections and moisture, as well as voltage spikes.

Besides the crash data, the following causes come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 77960-3A0-F620-M2 is defective?

A defect shows up as an airbag warning light that stays on permanently or intermittently, as a fault message, as a missing connection to the diagnostic tool, or as a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

These signs point to a defect:

• The airbag warning light stays on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

Any one of these signs is reason enough to have the fault memory read out.

Which vehicles is the 77960-3A0-F620-M2 fitted in?

The control unit 77960-3A0-F620-M2 is fitted in this vehicle: Honda CR-V 6 (from 2022).

The following list names the vehicle assigned to this part number.

• Honda CR-V 6 (from 2022)

Compare the part number on the label of the removed unit with this page, so that you can be sure you have the right unit in front of you. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or a plug or cable is the cause.

How does the repair of the 77960-3A0-F620-M2 work?

First have the fault memory read out and the log attached. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. Afterwards, your own unit comes back 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 77960-3A0-F620-M2 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel and pack the unit to withstand impact.