Airbag control unit with part number 77960-TFK-T010-M4

What does the airbag control unit 77960-TFK-T010-M4 do?

The airbag control unit 77960-TFK-T010-M4 is the central control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors, decides in an emergency within milliseconds which airbags and seatbelt pretensioners to trigger, and monitors the system continuously. After an accident it stores crash data and locks itself.

The control unit reports faults via the airbag warning light in the instrument cluster. To do so, it continuously checks the connections to the sensors, airbags and seatbelt pretensioners.

The lock is only lifted by the repair.

Why does the control unit 77960-TFK-T010-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Beyond that, other causes exist that concern the condition of the electronics.

Crash data cannot be erased with a normal diagnostic tool; Airbag24 erases it during the repair. The other causes are:

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

How can you tell that the 77960-TFK-T010-M4 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-TFK-T010-M4 permanently or intermittently. A fault message accompanies it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In this state, airbags and seatbelt pretensioners may not deploy in an emergency. The warning should therefore be taken seriously and checked promptly.

Which vehicles is the 77960-TFK-T010-M4 fitted in?

The 77960-TFK-T010-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The list shows the vehicles for which this part number is on record.

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Having the fault memory read out beforehand shows, by contrast, whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-TFK-T010-M4 work?

First, read out the fault memory and enclose the log. Then disconnect the battery, and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Processing usually takes 3–4 working days; after that the 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-TFK-T010-M4 get to Airbag24?

You send the control unit 77960-TFK-T010-M4 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.