Airbag control unit with part number 77960-T90-A140-M1

What does the airbag control unit 77960-T90-A140-M1 do?

An airbag control unit such as 77960-T90-A140-M1 ensures that airbags and seatbelt pretensioners deploy at the right moment in Honda vehicles. To do this, it evaluates the sensor data.

It works together with the entire restraint system and monitors its components continuously. If there is an irregularity, it reports this via the airbag warning light.

After an accident, the unit stores crash data and locks itself. The control unit is therefore a key part of the vehicle's safety technology.

Why does the control unit 77960-T90-A140-M1 fail?

Stored crash data is the most common cause in the 77960-T90-A140-M1, even when no airbag has deployed. A normal diagnostic tool cannot erase it. Other possible causes are aged electronic components, cold solder joints, moisture and voltage spikes.

The entries remain in memory until they are erased during the repair. So a failure to deploy says nothing about whether something is stored in the memory.

Aged electronics, cold solder joints and moisture at plug connections are among the further causes that can occur together during operation.

Voltage spikes from a weak battery or a jump start also strain the electronics.

How can you tell that the 77960-T90-A140-M1 is defective?

The airbag warning light in the instrument cluster shows a defect in the 77960-T90-A140-M1 by staying on continuously or intermittently. An error message appears alongside it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

Especially in an emergency it matters that airbags and seatbelt pretensioners deploy. With this fault, that may not be ensured, regardless of whether the car drives normally in everyday use.

Whether the control unit itself or a connection behind it is affected is determined by reading out the fault memory. The warning light alone is not enough.

Which vehicles is the 77960-T90-A140-M1 fitted in?

The control unit 77960-T90-A140-M1 is intended for Honda vehicles. It is fitted in the following vehicles: Honda Pilot 4th generation (from 2022).

The list shows the vehicles that are recorded for this number.

• Honda Pilot 4th generation (from 2022)

On the one hand, compare the part number on the label of the unit with this page; this only confirms the identity of the unit. On the other hand, have the fault memory read out before you remove the control unit. Only this result shows whether the unit is defective or whether a plug or cable is the cause.

How does the repair of the 77960-T90-A140-M1 work?

You have the fault memory read out and attach the log to the unit. Then you disconnect the battery and subsequently remove the control unit 77960-T90-A140-M1. Afterwards you create a repair order online and send the well-packed unit in.

Airbag24 examines the control unit on the test bench. Defective components are replaced, crash data is erased, and a function test follows.

Processing usually takes 3–4 working days, after which 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-A140-M1 get to Airbag24?

You send the control unit 77960-T90-A140-M1 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.