Airbag control unit with part number 77960-T2A-N050-M1

What does the airbag control unit 77960-T2A-N050-M1 do?

The airbag control unit 77960-T2A-N050-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and decides in a crash, within milliseconds, which airbags and seatbelt pretensioners are triggered. It monitors the system continuously and reports faults via the airbag warning light.

The sensor evaluation runs in the background throughout the entire journey. If the unit detects a fault, it creates an entry in the fault memory that a diagnostic tool can read out.

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

Why does the control unit 77960-T2A-N050-M1 fail?

The most common cause on the 77960-T2A-N050-M1 is stored crash data after an accident, even if no airbag has triggered, and a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes.

Crash data is not a malfunction of the electronics but a record of the event. Airbag24 erases it during the repair.

The remaining causes concern the electronics themselves. Components age, solder joints can go cold, and moisture or corrosion at connectors disturb the signals. Voltage spikes arise, for example, with a weak battery or when starting with external power.

How can you tell that the 77960-T2A-N050-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. Likewise the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared.

These signs indicate a defect as soon as they appear. They are indications and not a diagnosis, so checking the cause remains necessary.

In an emergency, airbags and seatbelt pretensioners may then possibly not trigger. Therefore have the fault checked promptly.

Which vehicles is the 77960-T2A-N050-M1 fitted in?

The control unit 77960-T2A-N050-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018). The list shows which vehicles are recorded for this number.

You will find the overview here.

• Honda CR-V 4 RM (2012-2018)

Match the part number on the label of the removed unit with this page; that only shows that it is the right unit. Also have the fault memory read out beforehand, because only this record shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-T0A-3070-M4, 77960-T0A-A012-M1, 77960-T0A-A013-M1, 77960-T0A-A210-M1, 77960-T0A-A212-M1, 77960-T0A-A230-M1.

How does the repair of the 77960-T2A-N050-M1 work?

First read out the fault memory and attach the log. Then disconnect the battery before you remove the control unit 77960-T2A-N050-M1. Then create a repair order online and send the unit in well packed.

At Airbag24 the unit is examined on the test bench. Defective components are repaired, stored crash data is erased, and then a function test follows. Your own unit then goes back to you.

Processing at Airbag24 usually takes 3–4 working days, and this time applies only to checking, repairing and testing. 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-T2A-N050-M1 get to Airbag24?

You send the control unit 77960-T2A-N050-M1 by parcel, or you arrange a UPS collection for an extra charge. After the repair Airbag24 returns it to you by UPS.

Include the printed repair order in the parcel and pack the unit shock-proof.