Airbag control unit with part number 77960-3A0-H620-M2

What does the airbag control unit 77960-3A0-H620-M2 do?

The airbag control unit 77960-3A0-H620-M2 is the central control unit of the SRS for Honda. It analyses the crash sensors, decides in a crash within milliseconds on triggering, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. In this way a fault becomes visible before it matters in an emergency.

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

Why does the control unit 77960-3A0-H620-M2 fail?

The most common cause for 77960-3A0-H620-M2 is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. In addition there are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes caused by a weak battery or jump-starting.

Airbag24 erases the crash data during the repair, and the control unit is then tested on the test bench.

The other causes concern the electronics and connections. Solder joints change over time, moisture and corrosion attack the connectors, and voltage spikes can strain the circuits.

How can you tell that the 77960-3A0-H620-M2 is defective?

A defect in the 77960-3A0-H620-M2 shows itself through the airbag warning light in the instrument cluster staying on permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

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

The warning light is the finding itself. So do not wait for the problem to resolve itself.

Which vehicles is the 77960-3A0-H620-M2 fitted in?

The 77960-3A0-H620-M2 is fitted in these vehicles: Honda CR-V 6 (from 2022).

The vehicles with this part number are listed below:

• Honda CR-V 6 (from 2022)

Compare the part number on the label of the removed unit with this page, so you know it is the right unit. Have the fault memory read out before removal, because only it shows whether the control unit is defective or a plug or cable is the cause.

How does the repair of the 77960-3A0-H620-M2 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Online you create a repair order and send in the well-packed unit.

Airbag24 tests it on the test bench, replaces defective components, erases crash data and carries out a function test. Processing 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 77960-3A0-H620-M2 get to Airbag24?

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

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