Airbag control unit with part number 77960-T2F-K020-M4

What does the airbag control unit 77960-T2F-K020-M4 do?

The airbag control unit 77960-T2F-K020-M4 controls the restraint system (SRS) of Honda. It evaluates the crash sensors, determines within milliseconds in a collision which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit indicates faults via the airbag warning light in the instrument cluster. The fault information remains stored in memory.

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

Why does the control unit 77960-T2F-K020-M4 fail?

The most common cause in the 77960-T2F-K020-M4 is crash data stored after an accident, even if no airbag has deployed. The following triggers may also apply:

• ageing electronic components
• cold solder joints
• moisture and corrosion at the plugs
• voltage spikes, for example from a weak battery

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair.

How can you tell that the 77960-T2F-K020-M4 is defective?

Signs like these point to a defect in the 77960-T2F-K020-M4, and then airbags and seatbelt pretensioners may fail to trigger in an emergency.

• The airbag warning light is on permanently or intermittently
• A fault message appears in the instrument cluster
• The diagnostic tool cannot reach the control unit
• The fault memory cannot be cleared

The warning light is the clearest warning signal. Take it seriously and have the system checked promptly.

Which vehicles is the 77960-T2F-K020-M4 fitted in?

The control unit 77960-T2F-K020-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019). The part number on the removed unit lets you check the assignment.

The following vehicles are assigned to this control unit:

• Honda Accord 9th generation (2012-2019)

Comparing the part number on the label with this page only secures the correct unit. Whether the control unit itself is defective, or a plug or cable is causing the fault, is shown only by reading out the fault memory. Therefore have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-SEA-G815-M1, 77960-T3L-A012-M1, C0W6K4VDA.

How does the repair of the 77960-T2F-K020-M4 work?

Have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Next, create a repair order online and send the unit in. Airbag24 needs 3–4 working days for checking, repairing and testing.

Airbag24 checks the unit on the test bench, repairs the defective components, erases stored crash data and carries out a function test. Afterwards your own unit comes 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-T2F-K020-M4 get to Airbag24?

You send the unit to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the control unit is packed shockproof.