Airbag control unit with part number 77960-T1G-B930-M4

What does the airbag control unit 77960-T1G-B930-M4 do?

The airbag control unit 77960-T1G-B930-M4 coordinates the SRS restraint system in the Honda vehicle. In an accident it processes the crash sensor data, decides within a fraction of a second on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

Faults are registered in the unit and shown via the airbag warning light in the instrument cluster. This is how the driver recognises that the system has registered a fault.

Why does the control unit 77960-T1G-B930-M4 fail?

Crash data from an accident is the most common cause, even if the airbag has not deployed at all. In addition come ageing, cold solder joints, moisture and corrosion at plug connections, and voltage peaks in the vehicle electrical system.

An ordinary diagnostic tool can read out the crash data but cannot erase it. Airbag24 takes on this task during the repair.

• ageing of electronic components
• cold solder joints
• moisture or corrosion on plugs
• voltage peaks, for example from a weak battery or a jump-start

How can you tell that the 77960-T1G-B930-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. Equally typical are a fault message in the instrument cluster, a diagnostic tool with no connection to the control unit, and a fault memory that cannot be cleared.

The light shows that the system has registered a fault, regardless of how the vehicle behaves in everyday use.

In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy. Please have the finding checked promptly.

Which vehicles is the 77960-T1G-B930-M4 fitted in?

The control unit 77960-T1G-B930-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

These models are listed:

• Honda CR-V 4 RM (2012-2018)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. More important is the fault memory: read it out before removal, and it will show whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T1G-B930-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and afterwards remove the control unit 77960-T1G-B930-M4. Next, create a repair order online and send the unit in well packed. At Airbag24, testing, repair and function test usually take 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components and erases the stored crash data. A function test follows, and your own unit is then returned to you.

The sequence of steps protects you while working on the vehicle. 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-T1G-B930-M4 get to Airbag24?

Send the control unit 77960-T1G-B930-M4 to Airbag24 as a parcel, or have it collected by UPS for an extra charge. Airbag24 returns it to you by UPS after the repair.

The repair order is printed out and goes into the parcel, and the unit is packed shock-proof.