Airbag control unit with part number 77960-T7S-Z810-M2

What does the airbag control unit 77960-T7S-Z810-M2 do?

The airbag control unit 77960-T7S-Z810-M2 coordinates the restraint system (SRS) of Honda. It reads the signals from the crash sensors and determines in the event of a crash, within milliseconds, which airbags and seatbelt pretensioners are triggered.

During operation it monitors the entire system. If it detects a fault, it switches on the airbag warning light in the instrument cluster, so that the fault is noticed immediately.

After an accident the unit creates crash data and locks itself afterwards.

Why does the control unit 77960-T7S-Z810-M2 fail?

The 77960-T7S-Z810-M2 most often fails because of crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool does not make them disappear. Other possible causes are aged components, cold solder joints, moisture on plug connections and voltage spikes.

The crash data is held in the memory of the control unit. Airbag24 removes it during the repair.

The other causes concern the electronics themselves. Components age, solder joints can go cold, and moisture attacks the plug connections.

Voltage spikes arise, for example, with a weak battery or when a jump start is connected, and put additional strain on the electronics.

How can you tell that the 77960-T7S-Z810-M2 is defective?

An airbag warning light in the instrument cluster that lights up permanently or from time to time indicates the defect on the 77960-T7S-Z810-M2. In an emergency, airbags and seatbelt pretensioners may then possibly not trigger.

Added to this are an error message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared. The combination of these features clearly calls for a check of the system.

The light therefore reports the state on its own initiative. React to it promptly.

Which vehicles is the 77960-T7S-Z810-M2 fitted in?

The control unit 77960-T7S-Z810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The overview with the individual vehicles follows here:

• Honda HR-V 2nd generation (2015-2022)

If the part number on the label of the removed unit matches this page, it is the correct unit. This comparison says nothing more. Whether the control unit is defective or whether a plug 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 77960-3V0-A81, 77960-T7S-A21, 77960-T7S-A212-M2, 77960T7SK410M2.

How does the repair of the 77960-T7S-Z810-M2 work?

First have the fault memory read out, enclose the log, disconnect the battery and remove the control unit 77960-T7S-Z810-M2. Then create the repair order online and send in the unit well packed. Airbag24 usually needs 3–4 working days for checking, repair and function testing.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Afterwards 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-T7S-Z810-M2 get to Airbag24?

You can send the control unit 77960-T7S-Z810-M2 in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Pack the unit shockproof and enclose the printed repair order.