Airbag control unit with part number 77960-T0A-Z812-M1

What does the airbag control unit 77960-T0A-Z812-M1 do?

For Honda, the airbag control unit 77960-T0A-Z812-M1 is the control unit of the restraint system (SRS). It receives the messages from the crash sensors, determines in an accident which airbags and seatbelt pretensioners trigger, and stores crash data after an accident. It then locks itself.

The entire sequence takes only milliseconds. During driving, the unit constantly checks the sensors and the wiring, and detected faults end up in the fault memory and on the airbag warning light.

In normal operation the unit remains inconspicuous, but it is active the whole time.

Why does the control unit 77960-T0A-Z812-M1 fail?

Crash data stored after an accident is the most common cause for the 77960-T0A-Z812-M1, even if no airbag has deployed. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible.

Crash data cannot be removed with a common diagnostic tool. Airbag24 erases it during the repair.

The electronics themselves can give way: components wear out, solder joints crack, and corrosion at plug connections leads to contact problems. Voltage spikes also belong here, for example with a weak battery or when a jump start is connected.

How can you tell that the 77960-T0A-Z812-M1 is defective?

The airbag warning light in the instrument cluster provides the information: if it stays on permanently or intermittently, the 77960-T0A-Z812-M1 is probably defective. An error message, a diagnostic tool without connection to the control unit, or a fault memory that cannot be cleared confirms this. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The warning light is the most important alarm of this system.

Which vehicles is the 77960-T0A-Z812-M1 fitted in?

The control unit 77960-T0A-Z812-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

Here is the list of vehicles:

• Honda CR-V 4 RM (2012-2018)

Check the part number on the label of the removed unit and hold it against this page. That only ensures that it is the right unit. Have the fault memory read out beforehand: only the log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T0A-Z812-M1 work?

For the 77960-T0A-Z812-M1, have the fault memory read out and attach the log to the unit. Then disconnect the battery and only afterwards remove the control unit. Finally, create the repair order online and send the unit in, well packed.

Airbag24 checks the control unit on the test bench, has defective components repaired and erases the stored crash data. A function test follows. Processing at Airbag24 usually takes 3–4 working days, after which you receive your own unit back.

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-T0A-Z812-M1 get to Airbag24?

You send the 77960-T0A-Z812-M1 directly to Airbag24 as a parcel, or you select a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

Make sure the control unit is packed in a shock-proof way and enclose the printed repair order.