Airbag control unit with part number 77960-SMG-E012-M1

What does the airbag control unit 77960-SMG-E012-M1 do?

The airbag control unit 77960-SMG-E012-M1 coordinates the restraint system (SRS) in Honda. It receives signals from the crash sensors and decides in a crash which airbags and seatbelt pretensioners are triggered. The decision is made within milliseconds.

The control unit also checks all components of the system continuously. It shows any faults it finds via the airbag warning light in the instrument cluster.

After a crash, it stores crash data and locks itself.

Why does the control unit 77960-SMG-E012-M1 fail?

With the 77960-SMG-E012-M1, the most common cause is stored crash data from an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it; Airbag24 erases it during the repair. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage peaks, for example from a weak battery.

The unit records the incident whether or not an airbag has deployed. After an incident, it is therefore advisable to think of this data first.

The other causes concern the electronics themselves and their connections. Components age and solder joints develop over time, while moisture attacks the contacts. Voltage peaks arise, for example, during jump-starting and stress the circuits.

How can you tell that the 77960-SMG-E012-M1 is defective?

A fault in the 77960-SMG-E012-M1 first shows up on the airbag warning light in the instrument cluster, which lights up permanently or intermittently. An error message is added. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• Airbag warning light lights up permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

Each of these signs is, on its own, reason enough for a check.

Which vehicles is the 77960-SMG-E012-M1 fitted in?

The vehicles in which this control unit is installed are known to us. The control unit 77960-SMG-E012-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The vehicles summarised in a list:

• Honda Civic 8th generation (2005-2011)

Compare the part number on the unit with this page. This only shows that it is the right control unit. Also have the fault memory read out before removal. Only this result reveals 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-SMG-G014-M1, 77960-SMG-G021-M1, 77960-SMG-G120-M1, 77960-SNA-L220-M1, 77960-SNA-L230-M1, 77960-SNA-M410-M1.

How does the repair of the 77960-SMG-E012-M1 work?

First the fault memory is read out; you enclose the log. Then you disconnect the battery; the control unit 77960-SMG-E012-M1 is removed only afterwards.

Processing at Airbag24 usually takes 3–4 working days. Create the repair order online, then pack the unit well and send it in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and performs 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-SMG-E012-M1 get to Airbag24?

You send the control unit 77960-SMG-E012-M1 to Airbag24 as a parcel or book a UPS collection for an extra charge. Airbag24 returns it to you by UPS after the repair.

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