Airbag control unit with part number 77960-TF0-Q813-M3

What does the airbag control unit 77960-TF0-Q813-M3 do?

The airbag control unit 77960-TF0-Q813-M3 is the central control unit of the restraint system (SRS) in Honda. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

During operation it checks the components of the system continuously. Faults are reported via the airbag warning light in the instrument cluster, so that a fault becomes visible.

After an accident the unit stores crash data and locks itself.

Why does the control unit 77960-TF0-Q813-M3 fail?

The most common cause for the control unit 77960-TF0-Q813-M3 is crash data stored after an accident, even if no airbag has triggered. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also involved.

The fact that no airbag has triggered does not mean there is no crash data. A standard diagnostic tool does not remove this data, so a simple reset achieves nothing.

The other causes develop over a longer period. Electronic components age, solder joints can go cold, and moisture attacks the plug connections. A weak battery or a jump start can also cause voltage spikes.

How can you tell that the 77960-TF0-Q813-M3 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears. The diagnostic tool cannot reach the control unit 77960-TF0-Q813-M3, and the fault memory cannot be cleared.

These signs appear singly or together:

• The airbag warning light stays on.
• The error message is visible in the instrument cluster.
• The diagnostic tool finds no connection.
• The fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not trigger. Such a finding should therefore be checked.

Which vehicles is the 77960-TF0-Q813-M3 fitted in?

The 77960-TF0-Q813-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015). You can check which entry applies to your car by means of the part number on the unit.

These vehicles match the control unit:

• Honda Jazz GE (2008-2015)

Comparing the part number on the removed unit with this page only shows whether it is the correct unit. Have the fault memory read out beforehand, because only its content shows whether the control unit is defective or a connector or cable is involved.

For the same vehicles, we also repair control units with the part numbers 5WK43461, 77960-SAA-G821-M1, 77960-SEG-G821-M1, 77960-TF0-G820-M3, 77960-TF0-G821.

How does the repair of the 77960-TF0-Q813-M3 work?

First read out the fault memory and enclose the log, then disconnect the battery. Only after that remove the control unit 77960-TF0-Q813-M3. Processing at Airbag24 usually takes 3–4 working days.

Then create the repair order online, pack the unit well and send it in. Airbag24 checks it on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. Your own unit is then 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-TF0-Q813-M3 get to Airbag24?

You send the control unit 77960-TF0-Q813-M3 as a parcel, or book a UPS collection for an extra charge. Airbag24 sends the unit back to you by UPS after the repair.

Enclose the printed repair order with the parcel, and pack the unit shock-proof.