Airbag control unit with part number 77960-T0A-H912-M4

What does the airbag control unit 77960-T0A-H912-M4 do?

The airbag control unit 77960-T0A-H912-M4 is the switching hub of the SRS in Honda vehicles. It evaluates the signals from the crash sensors, decides within milliseconds in an impact whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows detected faults via the airbag warning light.

Monitoring runs in the background as soon as the ignition is switched on. The unit checks firing circuits, sensor connections and the supply voltage.

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

Why does the control unit 77960-T0A-H912-M4 fail?

With the 77960-T0A-H912-M4, the most common cause is stored crash data, even if no airbag was triggered. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a jump start.

A standard diagnostic tool cannot erase this data. Airbag24 removes it as part of the repair.

The remaining causes lie in the electronics itself. Components age, and solder joints can go cold. Moisture and corrosion weaken the contact at plug connectors.

How can you tell that the 77960-T0A-H912-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may fail to trigger in an emergency.

The light is the most important sign. If it does not go out after switching on, have the system checked promptly.

Which vehicles is the 77960-T0A-H912-M4 fitted in?

The control unit 77960-T0A-H912-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

Here you will find the vehicles to which Airbag24 assigns this control unit.

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory read out beforehand.

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-H912-M4 work?

For the 77960-T0A-H912-M4, first have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Afterwards, create a repair order online and send the unit in well packed. Testing, repairing and function-testing at Airbag24 usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards, your own 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-T0A-H912-M4 get to Airbag24?

You send the 77960-T0A-H912-M4 in as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Include the printed repair order in the parcel, and pack the control unit shockproof.