Airbag control unit with part number 77960-T2A-S712-M1

What does the airbag control unit 77960-T2A-S712-M1 do?

The airbag control unit 77960-T2A-S712-M1 forms the control centre of the restraint system (SRS) in vehicles of Honda. It evaluates the signals from the crash sensors, decides in the event of an accident whether airbags and seatbelt pretensioners are triggered, and monitors the entire system. After an accident it stores crash data and locks itself.

The unit detects faults itself and records them in the fault memory. The airbag warning light in the instrument cluster informs the driver as soon as a fault is present.

This is precisely why the warning light matters.

Why does the control unit 77960-T2A-S712-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or jump-starting. Crash data stored on the control unit 77960-T2A-S712-M1 cannot be erased with a standard diagnostic tool.

Crash data show how the control unit recorded the event. They stay in memory even when little damage is still visible on the vehicle.

Ageing components and cold solder joints can cause intermittent faults, because the contact fluctuates. Moisture and corrosion at plug connections change the transition resistance, and voltage spikes place additional strain on the electronics.

How can you tell that the 77960-T2A-S712-M1 is defective?

Typical signs are the airbag warning light in the instrument cluster lighting up permanently or intermittently, a fault message in the instrument cluster, a diagnostic tool with no connection to the control unit 77960-T2A-S712-M1, and a fault memory that cannot be cleared. In this condition, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

The warning light reports a fault as soon as the control unit detects it. If it lights up after the ignition is switched on, have the system checked.

A fault message in the instrument cluster shows that the restraint system is not fully ready for use.

Which vehicles is the 77960-T2A-S712-M1 fitted in?

The control unit 77960-T2A-S712-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018). All details refer to Honda.

The following shows the vehicles known to us for this part number.

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the unit's label with this page, and you will know whether it is the correct unit. This comparison does not establish a cause. Whether the control unit is defective or a plug or cable is causing the fault is shown only by the fault memory, which you should have read out before removal.

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-S712-M1 work?

At Airbag24, processing usually takes 3–4 working days. First have the fault memory read out and attach the log, then disconnect the battery and remove the control unit 77960-T2A-S712-M1. Then create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then 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-T2A-S712-M1 get to Airbag24?

Either you pack the control unit 77960-T2A-S712-M1 and post it as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Enclose the printed repair order with the parcel, and pack the unit shock-proof.