Airbag control unit with part number 77960-T0A-X911-M1

What does the airbag control unit 77960-T0A-X911-M1 do?

The 77960-T0A-X911-M1 is the airbag control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors and, in an accident, triggers the appropriate airbags and seatbelt pretensioners within milliseconds.

The unit monitors the entire system permanently. It shows any detected fault via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself. Only a repair removes this lock.

Why does the control unit 77960-T0A-X911-M1 fail?

The most common cause is crash data from an accident, even without an airbag having deployed; an ordinary diagnostic tool cannot erase it. Further causes are of a general nature and likewise affect the electronics.

Crash data is created as soon as the control unit registers an event. Even if no airbag fired, the data stays in memory. The other causes can be summarised in a few points:

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

Each of these causes can occur on its own, and the test shows which of them applies.

How can you tell that the 77960-T0A-X911-M1 is defective?

A airbag warning light in the instrument cluster that lights up permanently or intermittently is the typical sign. Additional signs are a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

The following signs indicate a defect:

• The airbag warning light lights up permanently or intermittently.
• The instrument cluster shows a fault message.
• The diagnostic tool receives no connection to the control unit.
• The fault memory cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. A warning of this kind should therefore be checked promptly.

Which vehicles is the 77960-T0A-X911-M1 fitted in?

The control unit 77960-T0A-X911-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018). The information helps you check the matching assignment before removal.

The vehicles in the overview are:

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label of the removed unit with this page. That only shows that you have the right unit. Have the fault memory read out beforehand; only this record shows whether the control unit itself is defective or 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-X911-M1 work?

Your process begins with reading out the fault memory, then disconnecting the battery and removing the control unit. Afterwards you create a repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

The sequence is binding for your safety. You enclose the log of the fault memory with the unit and pack it shock-proof.

On the test bench at Airbag24, defective components are replaced, the crash data is erased and a function test is carried out. Afterwards your own unit is returned 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-T0A-X911-M1 get to Airbag24?

You can send a parcel containing the control unit 77960-T0A-X911-M1 yourself, or for an extra charge you book a UPS collection. Airbag24 returns the repaired unit to you by UPS.

The printed repair order goes into the carton, and the unit is to be packed shock-proof.