Airbag control unit with part number 77960-T6A-H720-M2

What does the airbag control unit 77960-T6A-H720-M2 do?

The airbag control unit 77960-T6A-H720-M2 coordinates the restraint system (SRS) of Honda. In an accident it calculates within fractions of a second which airbags and seatbelt pretensioners must be triggered. After an accident it stores crash data and locks itself; the lock is lifted only by the repair.

The sensors continuously supply measured values to the unit. If it detects a fault, it reports it via the airbag warning light in the instrument cluster.

It is therefore both evaluator and guardian of the system.

Why does the control unit 77960-T6A-H720-M2 fail?

The stored crash data is the most common cause, because it remains in the unit after an accident, even if no airbag has deployed. An ordinary diagnostic tool cannot erase it. In addition, aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, such as with a weak battery or a jump start, can cause the failure.

An accident does not have to have triggered an airbag for this; the data is recorded in the unit nonetheless.

The other causes develop step by step. Components age, solder joints can give way, and moisture and corrosion attack plug contacts.

Voltage spikes occur when the battery is weak or when the vehicle is started with external power.

How can you tell that the 77960-T6A-H720-M2 is defective?

The airbag warning light in the instrument cluster shows a defect on the 77960-T6A-H720-M2 by lighting up permanently or intermittently. A fault message may also appear, the diagnostic tool may not reach the control unit, or the fault memory cannot be cleared.

With such signs, airbags and seatbelt pretensioners may not deploy in an emergency. Therefore do not leave the system unattended; have it checked promptly.

Which vehicles is the 77960-T6A-H720-M2 fitted in?

The control unit 77960-T6A-H720-M2 is fitted in these vehicles: Honda Odyssey 5th generation (from 2013). Whether this information matches your car is confirmed by the part number on the removed unit.

The overview is as follows:

• Honda Odyssey 5th generation (from 2013)

On the one hand, compare the number on the label of the removed unit with this page, so that you have the correct unit in front of you. On the other hand, have the fault memory read out before removal. Only this result 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-THR-A02, 77960-THR-A03, 77960-TK8-A011-M1, 77960-TK8-D01.

How does the repair of the 77960-T6A-H720-M2 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next create the repair order online and pack the unit carefully before sending it in.

At Airbag24 the unit is first examined on the test bench. We replace defective components, erase stored crash data, and then a function test follows. The unit then goes back to you.

Processing takes 3–4 working days at our end as a rule.

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-T6A-H720-M2 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 handles the return after the repair by UPS.

Enclose the printed repair order with the parcel and pay attention to shock-proof packaging.