Airbag control unit with part number 77960-TEC-P410-M4

What does the airbag control unit 77960-TEC-P410-M4 do?

The 77960-TEC-P410-M4 is the central control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

The control unit monitors the system without interruption and indicates faults via the airbag warning light.

After an accident it creates crash data and locks itself. The next section deals with the crash data in more detail.

Why does the control unit 77960-TEC-P410-M4 fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed; an ordinary diagnostic tool cannot clear it. Behind this lie further causes such as ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains stored in the control unit after an accident until the repair removes it. An ordinary diagnostic tool does not remove it.

Ageing electronics and cold solder joints impair function over time. Moisture and corrosion at plug connections lead to poor contact.

Voltage spikes, for example with a weak battery or after a jump-start, can also burden the electronics.

How can you tell that the 77960-TEC-P410-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, a fault message appears, and the diagnostic tool does not reach the control unit. A fault memory that cannot be cleared is a further sign.

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

In an emergency, the airbags and seatbelt pretensioners may possibly not deploy. Have the system checked promptly.

Which vehicles is the 77960-TEC-P410-M4 fitted in?

The 77960-TEC-P410-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The following vehicles are recorded for this part number:

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the label of the removed unit with this page merely confirms that you have the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory log that has been read out. So have it read out beforehand.

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-TEC-P410-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Afterwards create the repair order online and send in the well-packed unit. At Airbag24, testing, repairing and checking usually take 3–4 working days.

Airbag24 checks the control unit, replaces defective components if needed, clears the 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-TEC-P410-M4 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you arrange a UPS collection for an extra charge. The return after the repair is also by UPS. Pack the printed repair order in with it and pack the unit shock-resistant.

A sturdy carton with filling material is enough for the unit to survive transport undamaged.