Airbag control unit with part number 77960-T2A-M510-M1

What does the airbag control unit 77960-T2A-M510-M1 do?

The 77960-T2A-M510-M1 controls the restraint system (SRS) for Honda. It continuously evaluates the signals of the crash sensors and decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

The airbag warning light in the instrument cluster shows the driver when the system detects a fault. This keeps the condition of the restraint system in view, including during normal driving.

Why does the control unit 77960-T2A-M510-M1 fail?

On the 77960-T2A-M510-M1, the most common cause is stored crash data after an accident, even when no airbag has deployed. It cannot be erased with a normal diagnostic tool; further causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, as well as voltage spikes.

An airbag deployment is not needed for the stored crash data. The other causes affect connections, electronics and the power supply, regardless of whether an accident preceded them. Voltage spikes arise, for example, from a weak battery or from jump-starting.

Which cause applies in an individual case cannot be determined without reading out the fault memory.

How can you tell that the 77960-T2A-M510-M1 is defective?

The airbag warning light in the instrument cluster lights up on the 77960-T2A-M510-M1, first permanently or intermittently, plus a fault message in the instrument cluster. In addition, no connection to the diagnostic tool is established, and the fault memory cannot be cleared.

The warning light is a clear signal: in an emergency, airbags and seatbelt pretensioners may not be able to deploy. A prompt check is therefore important, even if the vehicle otherwise runs normally in everyday use.

Which vehicles is the 77960-T2A-M510-M1 fitted in?

The control unit 77960-T2A-M510-M1 was built for Honda. It is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The overview below lists the vehicles in which this unit was fitted:

• Honda CR-V 4 RM (2012-2018)

First compare the part number on the label of the removed unit with this page. This confirms that it is the correct unit, but no more. Also have the fault memory read out, because only that result shows whether the control unit is defective or whether a connector or a 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-M510-M1 work?

For the repair of the 77960-T2A-M510-M1, first have the fault memory read out and attach the log, then disconnect the battery and remove the unit. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and pack the unit well before sending it in. Airbag24 checks it on the test bench, repairs defective components, deletes the stored crash data and carries out a function test.

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-M510-M1 get to Airbag24?

You can send the 77960-T2A-M510-M1 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order goes in the parcel, and you pack the control unit shockproof.