Airbag control unit with part number 77960-T0A-H411-M3

What does the airbag control unit 77960-T0A-H411-M3 do?

The airbag control unit 77960-T0A-H411-M3 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors, decides on the triggering of airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the system continuously.

It reports faults via the airbag warning light in the instrument cluster. After a crash the unit stores crash data and locks itself; this lock is released only by the repair.

Why does the control unit 77960-T0A-H411-M3 fail?

The most common cause: crash data stored after a crash, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Other causes include aged components, cold solder joints, moisture at connectors and voltage spikes.

Further causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at connectors
• voltage spikes, for example from a weak battery or jump-starting

Which cause is present is revealed only by evaluating the fault memory.

How can you tell that the 77960-T0A-H411-M3 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, and a fault message appears in the instrument cluster. A diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

The warning light is the most important signal: it shows that the system has detected a fault. In an emergency, airbags and seatbelt pretensioners may then fail to deploy, so have the finding checked promptly.

Which vehicles is the 77960-T0A-H411-M3 fitted in?

The control unit 77960-T0A-H411-M3 is fitted in vehicles of Honda: Honda CR-V 4 RM (2012-2018). Whether your vehicle is among them, check against the list on this page.

These vehicles are recorded for the part number:

• 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 you have the right unit in front of you. Have the fault memory read out beforehand, because that result shows whether the control unit is defective or whether a plug or a 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-H411-M3 work?

First have the fault memory read out and attach the log to the unit; then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and pack the unit well. The test, repair and functional check at Airbag24 usually take 3–4 working days.

On the test bench Airbag24 checks the unit and replaces defective components. Stored crash data is erased by Airbag24 during the repair; then a functional test follows, and 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-H411-M3 get to Airbag24?

You send the control unit 77960-T0A-H411-M3 as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the repaired unit back by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.