Airbag control unit with part number 77960-TF0-J450-M3

What does the airbag control unit 77960-TF0-J450-M3 do?

The control unit 77960-TF0-J450-M3 is the airbag control unit of the restraint system in Honda vehicles. It evaluates the readings from the crash sensors and decides within fractions of a second which airbags and seatbelt pretensioners deploy.

In addition, it checks the system continuously for faults and reports them via the airbag warning light. In an accident it records crash data and then locks itself.

The unit therefore has to function reliably for the restraint systems to work in an emergency.

Why does the control unit 77960-TF0-J450-M3 fail?

Stored crash data is the most common cause of a failure of the 77960-TF0-J450-M3, even without a deployed airbag. A normal diagnostic tool cannot remove it. Other causes include aged electronics, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

Crash data is recorded even if no airbag has deployed. Airbag24 erases it during the repair.

The other causes concern the electronics themselves. Moisture and corrosion damage the contacts, and aged components lose reliability over time.

Voltage spikes arise, for example, from a weak battery or when starting with jump leads.

How can you tell that the 77960-TF0-J450-M3 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 77960-TF0-J450-M3 when it lights up permanently or intermittently. Added to this are a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not deploy. These symptoms are a clear reason to have the system checked.

The signs alone do not reveal the cause. For that, the fault memory has to be read out.

Which vehicles is the 77960-TF0-J450-M3 fitted in?

The control unit 77960-TF0-J450-M3 is fitted in this vehicle: Honda Jazz GE (2008-2015).

The list below shows the vehicles for which this part number is registered:

• Honda Jazz GE (2008-2015)

First check whether the part number on the label of the removed unit matches this page; that only shows you have the correct unit. Also have the fault memory read out, because only its contents show whether the control unit itself is defective or whether a connector or 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-J450-M3 work?

First have the fault memory read out, disconnect the battery and only then remove the 77960-TF0-J450-M3. At Airbag24, inspection, repair and function test are normally completed within 3–4 working days.

Then create a repair order online, pack the unit well and send it in.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. 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-TF0-J450-M3 get to Airbag24?

You send the control unit 77960-TF0-J450-M3 as a parcel, or book a UPS collection for an extra charge. The return shipment after the repair is made by UPS.

Put the printed repair order in with the parcel and pack the control unit shockproof.