Airbag control unit with part number 77960-SWA-A212-M1

What does the airbag control unit 77960-SWA-A212-M1 do?

The 77960-SWA-A212-M1 is the airbag control unit of the restraint system (SRS) at Honda. It receives the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are activated.

The evaluation happens in a flash, while the impact is still taking place. During normal operation, the control unit monitors the system and reports faults via the airbag warning light.

After an accident, it stores crash data and locks itself.

Why does the control unit 77960-SWA-A212-M1 fail?

Stored crash data is the most common cause, even if no airbag has fired. Aged components, cold solder joints, moisture and voltage spikes can additionally lead to a failure.

These data cannot be erased with a usual diagnostic tool, so the fault remains.

The other causes are technical in nature: electronic components age, solder joints can go cold, and moisture or corrosion affects plug connections.

Voltage spikes arise, for example, from a weak battery or a jump start.

How can you tell that the 77960-SWA-A212-M1 is defective?

The airbag warning light in the instrument cluster indicates a fault constantly or intermittently, and an error message appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit.

The warning light is a clear sign that something is wrong in the restraint system. The fault memory also cannot be cleared, which confirms the suspicion of a defect.

As long as the fault persists, airbags and seatbelt pretensioners may fail to deploy in an emergency.

Which vehicles is the 77960-SWA-A212-M1 fitted in?

The list relates to the part number 77960-SWA-A212-M1. The control unit is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

These vehicles are recorded for this part number:

• Honda CR-V 3 RE (2006-2012)

Compare the part number on the label of the removed unit with this page. This tells you that you have the right unit; the comparison says nothing more. Have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SWA-G214-M4, 77960-SWA-S21, 77960-SWA-S214-M4, 77960-T0AA-110-M1, 77960-TA0-A031, 77960-TLA-A25.

How does the repair of the 77960-SWA-A212-M1 work?

At Airbag24, checking, repairing and function testing usually take 3–4 working days. These include testing on the test bench, replacing defective components and deleting the crash data.

The process begins with you reading out the fault memory and enclosing the log. You disconnect the battery and then remove the control unit. You then create the repair order online.

After the function test, your own unit goes back 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-SWA-A212-M1 get to Airbag24?

You send the control unit 77960-SWA-A212-M1 to Airbag24 as a parcel, or you book a UPS collection for an extra charge. UPS brings your own unit back after the repair.

The printed repair order goes in the parcel. Pack the unit shockproof.