Airbag control unit with part number 77960-TM0-K410-M3

What does the airbag control unit 77960-TM0-K410-M3 do?

The 77960-TM0-K410-M3 is the control unit of the airbag restraint system (SRS) in Honda vehicles. It continuously checks the sensors, calculates within milliseconds in an impact whether airbags and seatbelt pretensioners are to be triggered, and signals faults.

The evaluation runs in the background, whether the vehicle is stationary or moving. If a fault is detected, the unit stores it in the fault memory.

After an accident, it stores crash data and locks itself.

Why does the control unit 77960-TM0-K410-M3 fail?

The most common cause with the 77960-TM0-K410-M3 lies in stored crash data, which can arise even without an airbag having deployed. Conventional diagnostic tools cannot delete it; at Airbag24, the repair takes care of that. Further possible causes are aged components, cold solder joints, moisture and voltage spikes.

Crash data remain in the memory even if the vehicle drives normally again after the accident. The unit thus records the incident, regardless of how the accident unfolded in detail.

The other causes as an overview:

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

Whether any of these causes is present is only revealed by the inspection.

How can you tell that the 77960-TM0-K410-M3 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as there is a defect in the 77960-TM0-K410-M3. An error message may also appear; the diagnostic tool then finds no connection, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may not deploy.

If you see this light, have the fault memory read out promptly. Reading it with a suitable device shows which faults the system has stored and narrows down the cause.

Which vehicles is the 77960-TM0-K410-M3 fitted in?

The 77960-TM0-K410-M3 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The affected vehicles are listed here:

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label of the removed control unit with this page. This only confirms that it is the correct unit. The fault memory, which you have read out beforehand, clarifies the cause: it shows whether the control unit is defective or whether a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 77960-T0A-3070-M4, 77960-T0A-A012-M1, 77960-T0A-A013-M1, 77960-T0A-A210-M1, 77960-T0A-A212-M1, 77960-T0A-A230-M1.

How does the repair of the 77960-TM0-K410-M3 work?

First have the fault memory read out and enclose the log, then disconnect the battery. Afterwards, remove the 77960-TM0-K410-M3 and create a repair order online before sending in the unit. At Airbag24, processing usually requires 3–4 working days.

Airbag24 first tests the unit on the test bench before defective components are replaced. The team then deletes the crash data and carries out a function check. Your own unit is then returned to you.

The sequence of the first steps serves safety. 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-TM0-K410-M3 get to Airbag24?

You send the 77960-TM0-K410-M3 as a parcel, or book a UPS collection for an extra charge. After the repair, UPS takes the unit from Airbag24 back to you.

The printed repair order belongs in the parcel, and the unit must be packed shock-proof.