Airbag control unit with part number 77960-T5A-N850-M1

What does the airbag control unit 77960-T5A-N850-M1 do?

The 77960-T5A-N850-M1 forms the central switching unit of the restraint system (SRS) for Honda. It monitors the crash sensors, evaluates their signals and triggers the appropriate airbags and seatbelt pretensioners in an accident, within fractions of a second. Faults are reported via the airbag warning light.

The control unit checks the system for faults continuously. It receives readings, compares them with its specifications and logs deviations in the memory.

After an accident, the unit stores crash data and locks itself. The last sections of this page explain what this means for the repair.

Why does the control unit 77960-T5A-N850-M1 fail?

Stored crash data is the most common cause when the 77960-T5A-N850-M1 fails, even if no airbag was triggered in the accident. A normal diagnostic tool cannot erase this data. In addition, aged components, cold solder joints, moisture and corrosion, and voltage spikes come into consideration.

The crash data remains in the memory, even if no airbag has deployed. A standard diagnostic tool does not change it.

The other causes are of a more general nature. Electronic components age over time, solder joints can go cold, and moisture and corrosion attack the contacts in plug connections. Voltage spikes, for example from a weak battery or jump-starting, can also damage the electronics.

How can you tell that the 77960-T5A-N850-M1 is defective?

A defect in the 77960-T5A-N850-M1 is indicated by the airbag warning light in the instrument cluster as soon as it lights up permanently or intermittently. A fault message in the instrument cluster and a diagnostic tool without connection to the control unit come on top of this. In an emergency, the airbags and seatbelt pretensioners may not deploy.

A fault memory that cannot be cleared is a further sign of a problem in the system. The warning light exists precisely to make faults visible immediately.

If these signs appear, it is worth having the fault memory read out before any further steps.

Which vehicles is the 77960-T5A-N850-M1 fitted in?

This assignment applies to Honda. The control unit 77960-T5A-N850-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023).

The vehicles are listed here:

• Honda Jazz GK (2013-2023)

First, compare the part number on the label of the removed unit with this page. This confirms that you have the right unit. In addition, the fault memory read out shows whether the control unit is defective. A plug or a cable can just as well be the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SAA-F911-M1, 77960-SAA-G821-M1.

How does the repair of the 77960-T5A-N850-M1 work?

For the repair of the 77960-T5A-N850-M1, first have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Create the repair order online before the well-packed unit makes its way to Airbag24. There it is examined on the test bench, defective components are replaced, stored crash data is erased, and a function test concludes the work. Afterwards your own 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-T5A-N850-M1 get to Airbag24?

The 77960-T5A-N850-M1 reaches Airbag24 as a parcel, or alternatively a UPS collection can be booked for an extra charge. The return after the repair is made by UPS.

Pack the unit shock-proof and enclose the printed repair order.