Airbag control unit with part number 77960-T90-A310-M1

What does the airbag control unit 77960-T90-A310-M1 do?

The airbag control unit 77960-T90-A310-M1 acts as the central unit controlling the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors and, in an impact, decides within milliseconds which airbags and seatbelt pretensioners trigger. After an accident, it stores crash data and locks itself.

The unit monitors the system constantly and reports faults via the airbag warning light in the instrument cluster.

While driving, you do not consciously notice the control unit. Its function is limited to evaluation, monitoring and control of the restraint devices.

Why does the control unit 77960-T90-A310-M1 fail?

The most common cause is stored crash data after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the unit until Airbag24 erases it during the repair. It is therefore a stored state after the accident and not an indication of a defect in itself.

The other causes relate to components, solder joints and contacts. Ageing takes effect over time, moisture attacks the contacts, and voltage spikes from a weak battery or jump-starting stress the electronics.

How can you tell that the 77960-T90-A310-M1 is defective?

A defect shows first on the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and as a fault message in the instrument cluster. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then not trigger in an emergency.

The warning light is the clearest sign the unit gives itself. If it stays on or lights up repeatedly, that is a reason to have it checked.

Have the fault memory read out as soon as one of these signs appears. Only then is it clear whether the control unit itself or a plug or cable is affected.

Which vehicles is the 77960-T90-A310-M1 fitted in?

The control unit 77960-T90-A310-M1 is fitted in these vehicles: Honda Pilot 4th generation (from 2022). You match it with your vehicle using make, model and year of manufacture.

The list shows the vehicles in which this control unit is fitted.

• Honda Pilot 4th generation (from 2022)

On the one hand, compare the part number on the label of the removed unit with this page so that the correct unit is confirmed. On the other hand, have the fault memory read out beforehand. Only this result shows whether the control unit is defective or a plug or cable is the cause.

How does the repair of the 77960-T90-A310-M1 work?

Before removal, have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Afterwards, create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

This sequence is mandatory for safety reasons and must be observed before the unit leaves the vehicle.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards, your own 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-T90-A310-M1 get to Airbag24?

You send the control unit 77960-T90-A310-M1 as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

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