Airbag control unit with part number 77960-T2A-M512-M1

What does the airbag control unit 77960-T2A-M512-M1 do?

The airbag control unit 77960-T2A-M512-M1 is the central control unit of the restraint system (SRS) in the Honda. It evaluates crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. Faults are reported via the airbag warning light.

After an accident, it stores crash data and locks itself. Monitoring continues unnoticed in the meantime.

Why does the control unit 77960-T2A-M512-M1 fail?

The most common cause is stored crash data, even if no airbag has fired; a normal diagnostic tool cannot delete it. Other causes are ageing electronics, cold solder joints, moisture, corrosion and voltage spikes.

• Ageing electronic components on the circuit board
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example with a weak battery or jump-starting

Whether crash data is the cause is shown only by reading the fault memory. Airbag24 deletes stored crash data during the repair.

How can you tell that the 77960-T2A-M512-M1 is defective?

A fault shows itself through an airbag warning light in the instrument cluster that lights up permanently or intermittently, and through a fault message there. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

• Airbag warning light in the instrument cluster lights up permanently or intermittently
• Fault message in the instrument cluster
• No connection of the diagnostic tool to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy. Therefore have the system checked promptly.

Which vehicles is the 77960-T2A-M512-M1 fitted in?

The control unit 77960-T2A-M512-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The overview lists the vehicles assigned to this part number.

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the right unit. Have the fault memory read beforehand. Only this result 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-M512-M1 work?

First read the fault memory and enclose the log. Then disconnect the battery and remove the control unit. Afterwards, create a repair order online and send in the unit well packed.

Airbag24 examines the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards, your own unit is sent back.

Processing at Airbag24 usually takes 3–4 working days. 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-M512-M1 get to Airbag24?

You send the control unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Pack the printed repair order into the parcel and pack the unit shock-proof.