Airbag control unit with part number 77960-TF0-Z413-M3

What does the airbag control unit 77960-TF0-Z413-M3 do?

The airbag control unit 77960-TF0-Z413-M3 forms the head of the restraint system (SRS) in vehicles from Honda. It receives the readings from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and checks the entire system constantly. Detectable faults are shown via the airbag warning light.

If an accident occurs, the unit records crash data and locks itself. In everyday driving, you notice nothing of this.

The control unit continuously compares values, without the driver having to intervene. Detected faults end up in the fault memory, which a workshop or a diagnostic tool can read out.

Why does the control unit 77960-TF0-Z413-M3 fail?

With the 77960-TF0-Z413-M3, the main cause is crash data stored after an accident, even if no airbag has deployed. An ordinary diagnostic tool does not erase it. Ageing components, cold solder joints, moisture and corrosion at plug connectors, or voltage spikes may also contribute.

Stored crash data remains in the control unit until Airbag24 removes it during the repair. The unit registers it even when the airbags remained undamaged.

The other causes are rather technical in nature: electronic components age, solder joints can be cold, moisture attacks contacts, and voltage spikes, for example from a weak battery or a jump start, load the circuit.

Which of these applies only becomes clear when the control unit is tested.

How can you tell that the 77960-TF0-Z413-M3 is defective?

A defect in the 77960-TF0-Z413-M3 can be recognised by the airbag warning light, which stays on permanently or intermittently, and by a fault message in the instrument cluster. In addition, the diagnostic tool does not establish a connection to the control unit, and the fault memory cannot be erased. In this case, the airbags and seatbelt pretensioners may not be able to deploy in an emergency.

Look out for the following features:

• Warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot reach the control unit
• Fault memory cannot be erased

A lit warning light is a clear signal. Therefore have the vehicle checked promptly and do not wait to see whether the indication clears by itself.

Which vehicles is the 77960-TF0-Z413-M3 fitted in?

The control unit 77960-TF0-Z413-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

You will find the assigned models here:

• Honda Jazz GE (2008-2015)

Comparing the part number on the label of the removed unit with this page only ensures that it is the right unit. Also have the fault memory read out beforehand. Only the result shows whether the control unit is defective or whether a plug or cable is behind the fault.

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-Z413-M3 work?

For the 77960-TF0-Z413-M3, first have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Afterwards, create the repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. The unit then goes back to you.

This period relates only to the work at Airbag24. 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-Z413-M3 get to Airbag24?

You send the control unit 77960-TF0-Z413-M3 as a parcel, or book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

Insert the printed repair order into the parcel and pad the unit so that it is shock-proof.