Airbag control unit with part number 77960-TF0-Y640-M3

What does the airbag control unit 77960-TF0-Y640-M3 do?

As the airbag control unit 77960-TF0-Y640-M3, this unit manages the restraint system (SRS) in Honda vehicles. It reads the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners to fire, and checks the system permanently. It reports faults via the airbag warning light; after an accident it creates crash data and locks itself.

The checks run unobtrusively in the background.

A stable power supply and flawless cables are required for the unit to work correctly.

Why does the control unit 77960-TF0-Y640-M3 fail?

On the 77960-TF0-Y640-M3, the most frequent fault is caused by crash data that is stored after an accident, even if no airbag fired; an ordinary diagnostic tool does not remove it. In addition, ageing electronic components, cold solder joints, moisture with corrosion at plug connectors and voltage spikes can impair the function.

The crash data stays in the unit. It is present after an accident and does not disappear on its own.

The other factors act rather gradually. Ageing components lose reliability, and a cold solder joint or a corroded plug interrupts connections. Moisture promotes corrosion, and voltage spikes from jump-starts or a weak battery add further strain on the electronics.

How can you tell that the 77960-TF0-Y640-M3 is defective?

The airbag warning light on the 77960-TF0-Y640-M3 lights up constantly or comes on intermittently. Further signs are fault messages, a missing contact with the diagnostic tool or a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Typical signs:

• airbag warning light on permanently
• airbag warning light on intermittently
• fault message in the instrument cluster
• diagnostic tool gets no connection to the control unit
• fault memory remains after an attempt to clear it

Which vehicles is the 77960-TF0-Y640-M3 fitted in?

According to the assignment, the 77960-TF0-Y640-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

Here is the vehicle list:

• Honda Jazz GE (2008-2015)

On the one hand, comparing the part number on the label of your removed unit with this page confirms that you have the right unit. On the other hand, only the read-out fault memory shows whether the control unit is faulty or whether a plug or a cable is the cause.

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-Y640-M3 work?

For the 77960-TF0-Y640-M3, you proceed as follows: have the fault memory read out, attach the log, disconnect the battery and only then remove the control unit. Create the repair order online and send in the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces faulty components, deletes stored crash data and carries out a function test. Afterwards you get your own unit back.

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-Y640-M3 get to Airbag24?

The 77960-TF0-Y640-M3 reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. UPS handles the return shipment of the unit after the repair.

The printed repair order goes into the parcel, and the unit is packed shock-proof.