Airbag control unit with part number 77960-T00-T820-M2

What does the airbag control unit 77960-T00-T820-M2 do?

At Honda, the airbag control unit 77960-T00-T820-M2 evaluates the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered. It also checks the restraint system continuously for faults.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. That way, a malfunction does not go unnoticed.

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

Why does the control unit 77960-T00-T820-M2 fail?

Most often, the cause is crash data stored after an accident, even if no airbag has deployed. This data cannot be erased with an ordinary diagnostic tool. Ageing electronics, cold solder joints, moisture and corrosion on connectors, as well as voltage spikes, can also affect the 77960-T00-T820-M2.

An ordinary diagnostic tool cannot erase it. Airbag24 therefore removes the crash data as part of the repair.

In addition, electronic components are prone to ageing over time. Cold solder joints, moisture and corrosion at plug connections can also lead to faults. Voltage spikes from a weak battery or a jump start further upset the electronics.

How can you tell that the 77960-T00-T820-M2 is defective?

A defect in the 77960-T00-T820-M2 shows up as the airbag warning light in the instrument cluster and as fault messages. In addition, there may be connection problems with the diagnostic tool and a fault memory that cannot be cleared.

Pay particular attention to these signs:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot find the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not trigger when such signs are present. Therefore, have the system checked promptly.

Which vehicles is the 77960-T00-T820-M2 fitted in?

The control unit 77960-T00-T820-M2 is fitted in these vehicles: Honda City 6th generation (2008-2013).

The vehicles assigned to this part number are listed below:

• Honda City 6th generation (2008-2013)

Compare the part number on the label of the removed unit with this page. If both match, you have the correct unit in front of you.

Before removal, you should have the fault memory read out. The result 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 77810-T9DT81ZA, 77960-T00-Y810-M2.

How does the repair of the 77960-T00-T820-M2 work?

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

At Airbag24, the team checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. Processing usually takes 3–4 working days.

Afterwards, your own unit is returned 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-T00-T820-M2 get to Airbag24?

You send the control unit 77960-T00-T820-M2 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order in the parcel. Pack the unit shock-proof.