Airbag control unit with part number 77960-T2A-Q120-M1

What does the airbag control unit 77960-T2A-Q120-M1 do?

The airbag control unit 77960-T2A-Q120-M1 is the central control unit of the restraint system for Honda. It evaluates the signals from the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system constantly.

The control unit reports faults via the airbag warning light in the instrument cluster. Monitoring covers all connected components, from the sensors to the wiring.

After an accident, the unit stores crash data and locks itself. The unit therefore processes the sensor signals not only in an emergency, but throughout its entire operating life.

Why does the control unit 77960-T2A-Q120-M1 fail?

The most common cause in the control unit 77960-T2A-Q120-M1 is crash data stored after an accident, even if no airbag was triggered. Aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes, for example from a weak battery or jump-starting, can also cause the failure.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

Aged components and cold solder joints can show up under changing conditions. Moisture and corrosion mainly attack the contacts of plug connectors and disrupt the connection to the wiring harness.

How can you tell that the 77960-T2A-Q120-M1 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool cannot connect to the control unit 77960-T2A-Q120-M1, and the fault memory cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to trigger. If the warning light is on, have the system checked promptly and do not wait to see whether it goes out again.

The warning light shows that there is a fault, but not its cause. Only reading out the fault memory shows whether the control unit itself is affected.

Which vehicles is the 77960-T2A-Q120-M1 fitted in?

The airbag control unit 77960-T2A-Q120-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The following vehicles are assigned to this unit:

• Honda CR-V 4 RM (2012-2018)

Before sending it in, two checks help. Compare the part number on the label of the removed unit with this page, which only confirms that it is the right unit. Also have the fault memory read out, because only that shows whether the control unit is defective or a plug 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-Q120-M1 work?

First, have the fault memory read out and enclose the log. Then disconnect the battery and only after that remove the airbag control unit 77960-T2A-Q120-M1. Next, create a repair order online and send in the well-packed unit.

At Airbag24, the unit is checked on the test bench. Airbag24 replaces defective components if necessary, erases stored crash data during the repair, and a function test completes the work. Your own unit then goes back to you.

The sequence up to removal serves safety and is binding. Processing at Airbag24 usually takes 3–4 working days and covers only 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-Q120-M1 get to Airbag24?

You send the control unit 77960-T2A-Q120-M1 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

Put the printed repair order in the parcel and pack the unit shock-proof before handing it over.