Airbag control unit with part number 77960-T00-X810-M2

What does the airbag control unit 77960-T00-X810-M2 do?

The airbag control unit 77960-T00-X810-M2 coordinates the restraint system (SRS) of Honda. It processes the crash sensor data, decides in a collision within milliseconds whether to trigger, and controls the airbags and seatbelt pretensioners.

It also monitors the system continuously. If it detects a fault, the airbag warning light in the instrument cluster comes on and thereby indicates the condition of the system.

After an accident, the unit stores crash data and locks itself. The lock can only be released by a repair.

Why does the control unit 77960-T00-X810-M2 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A standard diagnostic tool cannot erase it. Other general causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes in the vehicle electrical system.

Crash data is the reason a unit can report faults after an incident even when the airbags are undamaged. It remains in the memory until Airbag24 removes it during the repair.

The remaining causes concern the electronics and their connections. A corroded contact or a cold solder joint can make itself felt only intermittently, under vibration or heat.

How can you tell that the 77960-T00-X810-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In that case, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the signal to watch for. It shows the fault before you would otherwise notice it in everyday driving.

If the lamp does not go out after switching on the ignition, the system should be checked. A message that appears only occasionally is also a reason to have the fault memory read out.

Which vehicles is the 77960-T00-X810-M2 fitted in?

The control unit 77960-T00-X810-M2 is fitted in this vehicle: Honda City 6th generation (2008-2013).

This part number is recorded for the following models:

• Honda City 6th generation (2008-2013)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Also have the fault memory read out in advance, because only the result shows whether the control unit itself or a plug or 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-T00-X810-M2 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only afterwards 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, replaces defective components, erases the stored crash data and carries out a functional test.

The unit is then returned to you. Processing at Airbag24 usually takes 3–4 working days, and this period covers only the checking, repair and functional test. 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-T00-X810-M2 get to Airbag24?

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

The printed repair order belongs in the parcel. Pack the control unit shock-proof so that it is not damaged in transit.