Airbag control unit with part number 77960-3A0-Z220-M2

What does the airbag control unit 77960-3A0-Z220-M2 do?

The airbag control unit 77960-3A0-Z220-M2 runs the restraint system in vehicles from Honda. In a crash it reads the signals from the crash sensors and decides within a few milliseconds which airbags and seatbelt pretensioners are triggered. Outside of an accident it monitors the system continuously and shows faults via the airbag warning light.

This monitoring covers the power supply, the lines to the firing units and the sensors. Every deviation is recorded in the fault memory.

If an accident occurs, the control unit stores crash data and locks itself.

Why does the control unit 77960-3A0-Z220-M2 fail?

Stored crash data is the most common cause: it arises after an accident, even if no airbag has triggered, and a normal diagnostic tool cannot remove it. Alongside this, aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from weak batteries or jump-starting come into consideration. Airbag24 erases the crash data during the repair.

The memory entry remains until the repair removes it. Waiting or unplugging and reconnecting will not clear it.

The other causes develop gradually. A damp plug connection slowly loses contact until faults become visible, and electronics age very gradually.

How can you tell that the 77960-3A0-Z220-M2 is defective?

The most important sign is the airbag warning light in the instrument cluster, which lights up permanently or only intermittently. In addition there is a fault message in the instrument cluster, a diagnostic tool without connection to the control unit, or a fault memory that cannot be erased. In this condition airbags and seatbelt pretensioners may not trigger in an emergency.

The light is the direct indication from the system: it reports a detected fault even when the car drives normally. That is why it is worth looking at the instrument cluster after switching on the ignition.

A light that keeps coming on deserves the same attention as a permanent one.

Which vehicles is the 77960-3A0-Z220-M2 fitted in?

The airbag control unit 77960-3A0-Z220-M2 is fitted in these vehicles: Honda CR-V 6 (from 2022).

The list below shows the vehicles recorded for this part number.

• Honda CR-V 6 (from 2022)

Match the number on the label of the removed unit with this page. That way you can be sure that you have the correct unit in front of you. Also have the fault memory read out, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

How does the repair of the 77960-3A0-Z220-M2 work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, have the fault memory read out and attach the log, disconnect the battery and remove the control unit only afterwards. Then create the repair order online and send in the unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Afterwards the unit goes 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-Z220-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 the unit back to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shock-resistant.