Airbag control unit with part number 77960-SNB-D012-M1

What does the airbag control unit 77960-SNB-D012-M1 do?

The airbag control unit 77960-SNB-D012-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and decides in an emergency, within a few milliseconds, which airbags and seatbelt pretensioners are triggered.

The crash sensors continuously supply the unit with measured values. From these it calculates whether an impact is severe enough, and activates only the restraint devices that match the particular accident situation.

During normal driving the unit monitors the entire system without interruption. If it detects a fault, it stores it and reports it via the airbag warning light. After an accident it also stores crash data and locks itself.

Why does the control unit 77960-SNB-D012-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot clear it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion on plug connectors, as well as voltage spikes, for example from a weak battery or jump-starting.

Crash data can arise even from impacts that do not deploy an airbag. The unit records them, and they remain in the memory until they are removed during the repair.

Aged components lose reliability over the years. Cold solder joints from production can interrupt connections, and moisture or corrosion affect plug connectors.

Voltage spikes, for example when jump-start cables are connected or with a weak battery, place additional strain on the electronics.

How can you tell that the 77960-SNB-D012-M1 is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, as an error message in the instrument cluster, as a lack of connection to the diagnostic tool, and as a fault memory that cannot be cleared.

The airbag warning light is the most important indication. It stays on permanently or comes on again and again as soon as the system detects a fault. If it lights up, have the system checked promptly.

An error message in the instrument cluster confirms this picture. If the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared, there is also a problem in the system.

If the system is faulty, airbags and seatbelt pretensioners may not deploy as intended in an emergency. Do not drive with a permanently lit warning light without having the cause clarified.

Which vehicles is the 77960-SNB-D012-M1 fitted in?

The 77960-SNB-D012-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The following overview lists the vehicles that are recorded for this part number.

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit.

Also have the fault memory read out beforehand. Only this 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-S02-A840-M3, 77960-SMG-G014-M1.

How does the repair of the 77960-SNB-D012-M1 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed unit. The repair at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. The team then deletes the stored crash data and carries out a function test.

The 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-SNB-D012-M1 get to Airbag24?

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

Put the printed repair order in the parcel and pack the control unit shockproof.