Airbag control unit with part number 77960-T5R-A230-M2

What does the airbag control unit 77960-T5R-A230-M2 do?

The airbag control unit 77960-T5R-A230-M2 is the control centre of the restraint system (SRS) in Honda. It processes the signals from the crash sensors, decides within milliseconds in an accident whether to trigger airbags and seatbelt pretensioners, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. This makes a malfunctioning system visible to you.

After an accident the unit stores crash data and locks itself.

Why does the control unit 77960-T5R-A230-M2 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident. A standard diagnostic tool cannot access this data. Further causes can be ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data is stored inside the control unit itself, which is why nothing can be seen on the vehicle from outside.

The other causes are general in nature. Electronics age, solder joints can go cold, moisture and corrosion attack the contacts, and voltage spikes occur, for example, with a weak battery or a jump start.

How can you tell that the 77960-T5R-A230-M2 is defective?

A defect shows up through the airbag warning light in the instrument cluster, which stays on continuously or intermittently, through a fault message in the instrument cluster, through no connection to the diagnostic tool, and through a fault memory that cannot be cleared.

The warning light is the most important sign. It indicates a malfunction but does not say where the fault lies, because plugs or cables can cause it just as well.

While the system is faulty, airbags and seatbelt pretensioners may fail to deploy in an emergency. A prompt check is therefore advisable.

Which vehicles is the 77960-T5R-A230-M2 fitted in?

The control unit 77960-T5R-A230-M2 is fitted in the following vehicles: Honda Jazz GK (2013-2023). The details are a guide only, not a check of the unit.

The list below shows the vehicles for which we have this part number.

• Honda Jazz GK (2013-2023)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Have the fault memory read out beforehand. Only the log shows whether the control unit is defective or whether a plug or a 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-T5R-A230-M2 work?

Have the fault memory read out and attach the log to the unit. Disconnect the battery and only then remove the control unit. Create an online repair order and pack the unit well. For processing at Airbag24, allow for 3–4 working days as a rule.

At Airbag24 the team checks the unit on the test bench, replaces defective components and deletes the stored crash data. A function test follows, and then your own unit is returned.

The order of the steps at the vehicle 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-T5R-A230-M2 get to Airbag24?

You send the control unit as a parcel to Airbag24 or, for an extra charge, book a UPS collection. After the repair Airbag24 sends your own unit back by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.