Airbag control unit with part number 77960-TF3-E811-M3

What does the airbag control unit 77960-TF3-E811-M3 do?

The airbag control unit 77960-TF3-E811-M3 controls the restraint system (SRS) of Honda and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. It evaluates the signals of the crash sensors and indicates faults via the airbag warning light.

Monitoring takes place continuously. In normal operation it remains invisible to you that the unit is working.

After an accident the unit stores crash data and locks itself. The effects of this lock on diagnosis and repair are described in the next sections.

Why does the control unit 77960-TF3-E811-M3 fail?

As the most common cause of the 77960-TF3-E811-M3, crash data stored after an accident applies, even without a triggered airbag. A standard diagnostic tool cannot erase them. Further causes are ageing components, moisture and voltage spikes.

Further causes include:

• ageing electronic components,
• cold solder joints,
• moisture and corrosion at plug connections,
• voltage spikes, for example with a weak battery or jump-starting.

How can you tell that the 77960-TF3-E811-M3 is defective?

A defect in the 77960-TF3-E811-M3 is recognised by the airbag warning light in the instrument cluster, by fault messages there and by missing connections to the diagnostic tool. A fault memory that cannot be cleared also indicates it. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The signs in detail:

• The airbag warning light stays on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool gets no connection to the control unit.
• The fault memory cannot be cleared.

Have the finding checked promptly. The light already indicates the fault.

Which vehicles is the 77960-TF3-E811-M3 fitted in?

The 77960-TF3-E811-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015). This information is based on our assignment for the part number.

The list shows which vehicles are known to us for this part number.

• Honda Jazz GE (2008-2015)

Compare the part number on the label of the removed unit with this page, because that way you can be sure you have the correct unit. Have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WK43461, 77960-TF0-E820-M3, 77960-TF0-E821-M3, 77960-TF0-E832-M3, 77960-TF0-E840-M3, 77960-TF0-G820-M3.

How does the repair of the 77960-TF3-E811-M3 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the 77960-TF3-E811-M3, and only then create a repair order online. Send the well-packed unit afterwards.

At Airbag24 a technician checks the control unit on the test bench, replaces defective components and erases stored crash data. A function test follows before your own unit is returned. Checking, repairing and testing at Airbag24 usually takes 3–4 working days.

The sequence is fixed for safety reasons. 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-TF3-E811-M3 get to Airbag24?

You send the control unit 77960-TF3-E811-M3 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Include the printed repair order in the parcel and pack the unit shockproof.