Airbag control unit with part number 77960-TF0-Q820-M3

What does the airbag control unit 77960-TF0-Q820-M3 do?

The airbag control unit 77960-TF0-Q820-M3 controls the restraint system in Honda vehicles. It records through the crash sensors what happens in an accident, and triggers airbags and seatbelt pretensioners within milliseconds.

In addition, it monitors the entire system and displays faults via the airbag warning light in the instrument cluster.

After an accident, the unit writes crash data to its memory and then locks itself.

Why does the control unit 77960-TF0-Q820-M3 fail?

Stored crash data after an accident is the most common cause of a failure of the 77960-TF0-Q820-M3, even without a triggered airbag. Other causes are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase the crash data, so it stays in the memory.

The other causes concern the electronics itself and its connections. Solder joints can be cold, plug connectors become damp or corrode, and voltage spikes occur, for example, with a weak battery or jump-starting.

How can you tell that the 77960-TF0-Q820-M3 is defective?

You can recognise a defect on the 77960-TF0-Q820-M3 by several signs at once that point to the restraint system. Above all, there is the airbag warning light in the instrument cluster, which stays on permanently or intermittently.

The following points belong to this:

• Airbag warning light in the instrument cluster stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool without a connection to the control unit
• Fault memory cannot be erased

In an emergency, airbags and seatbelt pretensioners may not deploy if the control unit is faulty. A prompt check is therefore advisable.

Which vehicles is the 77960-TF0-Q820-M3 fitted in?

The 77960-TF0-Q820-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

The matching models are listed below.

• Honda Jazz GE (2008-2015)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Also have the fault memory read out, because only this log shows whether the control unit is defective or 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-Q820-M3 work?

First, have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Create the repair order online, and send in the unit well packed. Airbag24 needs 3–4 working days for the 77960-TF0-Q820-M3, counted for inspection, repair and testing.

After dispatch, Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The unit is then returned 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-Q820-M3 get to Airbag24?

You send the control unit 77960-TF0-Q820-M3 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

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