Airbag control unit with part number 77960-TG1-F410-M2

What does the airbag control unit 77960-TG1-F410-M2 do?

The airbag control unit 77960-TG1-F410-M2 is the central component of the restraint system (SRS) in Honda. It evaluates the crash sensor signals and determines in an accident which airbags and seatbelt pretensioners fire. Faults in the system are reported via the airbag warning light.

The evaluation happens within fractions of a second, as soon as the sensors report an impact.

After an accident the unit stores crash data and locks itself. The system continues to monitor itself.

Why does the control unit 77960-TG1-F410-M2 fail?

Stored crash data is the most common cause, even when no airbag was triggered in the accident. A normal diagnostic tool cannot erase it. In addition, aged components, solder joints and moisture at plugs come into consideration.

The crash data is stored in the memory because the unit secures it in an accident. Reading it out shows it, but erasing it is not possible this way.

The other causes are ageing of the electronics, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes. Voltage spikes occur, for example, with a weak battery or with a jump start, because higher voltages are briefly present then.

How can you tell that the 77960-TG1-F410-M2 is defective?

A defect shows up on the airbag warning light in the instrument cluster when it lights up permanently or intermittently. Also an error message in the instrument cluster or a missing connection to the diagnostic tool are indications.

• airbag warning light lit permanently or intermittently
• error message in the instrument cluster
• diagnostic tool without connection to the control unit
• fault memory that cannot be erased

The signs affect the function directly. In an emergency, airbags and seatbelt pretensioners may possibly fail to deploy. Have the indication checked promptly.

Which vehicles is the 77960-TG1-F410-M2 fitted in?

The control unit 77960-TG1-F410-M2 is fitted in these vehicles: Honda City 6th generation (2008-2013). The part number remains decisive.

The vehicles at a glance:

• Honda City 6th generation (2008-2013)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the right unit. Also have the fault memory read out beforehand. Only this result shows whether the control unit itself 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 77810-T9DT81ZA, 77960-T00-Y810-M2.

How does the repair of the 77960-TG1-F410-M2 work?

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

Airbag24 checks the submitted unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Checking, repairing and testing take 3–4 working days as a rule. The unit then 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-TG1-F410-M2 get to Airbag24?

You either send the unit as a parcel yourself or book a UPS collection for an extra charge. UPS handles the return after the repair.

Enclose the printed repair order in the parcel and pack the unit shockproof.