Airbag control unit with part number 77960-TF0-Y440-M3

What does the airbag control unit 77960-TF0-Y440-M3 do?

The airbag control unit 77960-TF0-Y440-M3 is the central control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors, decides within milliseconds in an accident on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The evaluation is carried out electronically and automatically, without the driver having to intervene. The unit also detects faults in the system and records them.

Faults are reported via the airbag warning light fitted in the instrument cluster.

Why does the control unit 77960-TF0-Y440-M3 fail?

Stored crash data is the most common cause with the 77960-TF0-Y440-M3, even where no airbag has deployed. A standard diagnostic tool cannot erase it. Other causes are ageing components, solder joints and moisture.

Crash data remains in the memory after an impact, even if the vehicle appears unremarkable from the outside. At Airbag24, it is removed as part of the repair.

Electronics age, and solder joints can go cold. Damp plug connections corrode, and voltage spikes from weak batteries or jump starts place additional strain on the unit.

How can you tell that the 77960-TF0-Y440-M3 is defective?

The airbag warning light on the 77960-TF0-Y440-M3 lights up permanently or only intermittently, and an error message appears in the instrument cluster. The diagnostic tool cannot establish a connection, and the fault memory remains.

These signs indicate a defect:

• Airbag warning light that is on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool with no connection to the control unit
• Fault memory that cannot be cleared

Anyone who notices one of these signs should bear in mind that airbags and seatbelt pretensioners may not deploy in an emergency.

Which vehicles is the 77960-TF0-Y440-M3 fitted in?

The 77960-TF0-Y440-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

You will find the models with this control unit in the list below.

• Honda Jazz GE (2008-2015)

Check the label before removal and compare the part number with this information. A fault memory read out beforehand shows whether the control unit is really affected.

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-Y440-M3 work?

You read out the fault memory before removal and enclose the log. Then you disconnect the battery, remove the control unit and create a repair order online. After that, send the unit in well packed.

At Airbag24, the unit is checked, defective components are replaced, the crash data is deleted and a function test is carried out. Only then is your own unit returned to you.

Checking, repairing and testing at Airbag24 usually take 3–4 working days, but this applies only to checking, repairing and testing. 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-Y440-M3 get to Airbag24?

You send the control unit 77960-TF0-Y440-M3 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Your printed repair order belongs in the parcel. Make sure the unit is packed shock-resistant.