Airbag control unit with part number 77960-TF0-Y431-M3

What does the airbag control unit 77960-TF0-Y431-M3 do?

The airbag control unit 77960-TF0-Y431-M3 is the central control unit of the restraint system (SRS) in Honda. It evaluates the crash sensor signals and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners deploy.

During operation, it checks the system continuously and displays faults via the airbag warning light. After an accident, it stores crash data and locks itself, and the lock is only lifted by a repair.

The control unit thus connects the sensors with the triggers.

Why does the control unit 77960-TF0-Y431-M3 fail?

The most common cause for the 77960-TF0-Y431-M3 is crash data stored after an accident, even if no airbag has deployed. Aged components, cold solder joints, moisture and corrosion at plug connections, or voltage spikes can also cause the failure.

A standard diagnostic tool cannot remove this crash data, which is why the fault does not disappear by itself. Airbag24 erases the crash data during the repair.

Aged components, cold solder joints and moisture at plugs are causes that can only be narrowed down by an examination. Voltage spikes, for example from a weak battery or a jump start, may also play a role.

How can you tell that the 77960-TF0-Y431-M3 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as a fault is detected on the 77960-TF0-Y431-M3. A fault message in the instrument cluster, a lost connection to the diagnostic tool and a fault memory that cannot be cleared are added to this.

A defect in the control unit may possibly mean that airbags and seatbelt pretensioners do not deploy in an emergency. The warning light shows the defect, which is why you should not ignore it.

Which vehicles is the 77960-TF0-Y431-M3 fitted in?

The airbag control unit 77960-TF0-Y431-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

The following overview shows which vehicles our assignment includes.

• Honda Jazz GE (2008-2015)

Comparing the part number on the removed unit with this page confirms the identity of the unit. Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a connector or cable is responsible.

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-Y431-M3 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit of the 77960-TF0-Y431-M3, before you create a repair order online and send the unit in well packed.

Processing at Airbag24 usually takes 3–4 working days. This period refers only to checking, repairing and testing in our workshop.

Airbag24 checks the unit, replaces defective components, deletes the crash data and carries out a function test. The unit then 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-Y431-M3 get to Airbag24?

You send the 77960-TF0-Y431-M3 in as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the unit back to you by UPS once the repair is complete.

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