Airbag control unit with part number 77960-T5A-C220-M1

What does the airbag control unit 77960-T5A-C220-M1 do?

The airbag control unit 77960-T5A-C220-M1 is the central control unit of the restraint system (SRS) in the Honda. It evaluates the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners to trigger, and monitors the system continuously.

The sensors report their measurements continuously to the control unit. There, it checks whether an impact requires the restraint systems to be triggered. Detected faults are stored by the unit and shown via the airbag warning light.

After a crash, it stores crash data and locks itself.

Why does the control unit 77960-T5A-C220-M1 fail?

Stored crash data are the most common cause for the control unit 77960-T5A-C220-M1, even if no airbag was triggered in the accident. A standard diagnostic tool cannot delete them. Other possible causes include ageing components, cold solder joints, moisture and corrosion at plugs, and voltage spikes, for example from a weak battery or jump-starting.

Crash data arise in an accident regardless of whether an airbag has triggered. The unit stores them and keeps them until they are deliberately removed. That is why it can report faults even when the vehicle seems to drive normally after the accident.

The other causes are general. Electronic components age, solder joints can go cold, and moisture or corrosion affect the plug connections. Voltage spikes from the vehicle electrical system can also harm the electronics.

How can you tell that the 77960-T5A-C220-M1 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-T5A-C220-M1 permanently or intermittently. Added to this are a fault message in the instrument cluster, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared.

The warning light is the most important sign. It shows that the control unit has detected a fault in the system. If the warning light stays on permanently, have the system checked.

If the diagnostic tool is not connected to the control unit, or if the fault memory remains full despite an attempt to clear it, this also points to a fault. In this case, airbags and seatbelt pretensioners may possibly not deploy in an emergency. Therefore have the system checked promptly.

Which vehicles is the 77960-T5A-C220-M1 fitted in?

The control unit 77960-T5A-C220-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023). Check during removal whether your vehicle matches this information.

The following overview shows the vehicles known for this part number.

• Honda Jazz GK (2013-2023)

Two pieces of advice will help you. Firstly, compare the part number on the label of the removed unit with this page; this only ensures that you have the correct unit in front of you. Secondly, have the fault memory read out beforehand, because only the result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-T5A-A212-M1, 77960-T5A-E010-M1, 77960-T5A-E011-M1, 77960-T5A-E020-M1, 77960-T5A-F010-M1, 77960-T5A-F011-M1.

How does the repair of the 77960-T5A-C220-M1 work?

First have the fault memory read out and attach the log. Only then disconnect the battery and remove the control unit 77960-T5A-C220-M1. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and pack the unit well before sending it. At Airbag24 it is checked on the test bench, defects in individual components are rectified, and stored crash data are deleted. This is followed by a functional test, and your own repaired unit is 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-T5A-C220-M1 get to Airbag24?

You send the control unit 77960-T5A-C220-M1 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Put the printed repair order in the parcel and pack the unit shockproof. Careful packaging protects it during transport.