Airbag control unit with part number 77960-T2A-S710-M1

What does the airbag control unit 77960-T2A-S710-M1 do?

The airbag control unit 77960-T2A-S710-M1 controls the SRS restraint system for Honda. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners trigger, and monitors the system continuously. After an accident it stores crash data and locks itself.

It reports faults via the airbag warning light in the instrument cluster. Monitoring runs continuously, even when the vehicle is standing still.

Because airbags and seatbelt pretensioners are controlled directly by this unit, any fault affects the entire restraint system.

Why does the control unit 77960-T2A-S710-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump start.

Stored crash data remains in the unit until it is erased. A diagnostic tool can display the entry, but cannot remove it.

Aged components, cold solder joints and corrosion at the plugs develop over time. Moisture accelerates this process at the contacts.

Voltage spikes, for example from a weak battery or a jump start, additionally stress the electronics.

How can you tell that the 77960-T2A-S710-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may fail to deploy in an emergency.

The warning light is the direct indication in the vehicle and shows the defect. A fault message in the instrument cluster additionally confirms this.

A diagnostic tool shows whether the control unit is reachable and which entries are in the fault memory.

Which vehicles is the 77960-T2A-S710-M1 fitted in?

The airbag control unit 77960-T2A-S710-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The list shows the vehicles recorded for this part number.

• Honda CR-V 4 RM (2012-2018)

Before removal, compare the part number on the label of the unit with this page; that only confirms it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether 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-S710-M1 work?

First have the fault memory read out and attach the log. Then disconnect the battery, only then remove the control unit 77960-T2A-S710-M1, and create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

You send the unit in well packed. This sequence serves your safety and is therefore binding.

At Airbag24 the team checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Afterwards 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-T2A-S710-M1 get to Airbag24?

You send the control unit 77960-T2A-S710-M1 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Enclose the printed repair order with the parcel and pack the unit shock-resistant before sending it.