Airbag control unit with part number 77960-SWA-N811-M1

What does the airbag control unit 77960-SWA-N811-M1 do?

The airbag control unit 77960-SWA-N811-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the sensors, decides in an accident within a few milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

It reports faults via the airbag warning light in the instrument cluster and enters them in the fault memory. This monitoring works during every journey, without you having to intervene.

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

Why does the control unit 77960-SWA-N811-M1 fail?

Most common cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot delete it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data is the record the control unit secures after an impact. At Airbag24 it is deleted as part of the repair.

The other causes lie in the electronics and their surroundings. Components age, solder joints can be poorly connected, and moisture attacks plug connections. Voltage spikes from a weak battery or jump-starting can also affect the unit.

How can you tell that the 77960-SWA-N811-M1 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through an error message in the instrument cluster. In addition the diagnostic tool may be unable to connect to the control unit, or the fault memory remains despite clearing.

Such signs mean that airbags and seatbelt pretensioners may not trigger in an emergency. The warning light shows the finding as soon as it occurs, so it should not be ignored.

Even if the vehicle continues to drive normally, it is worth clarifying the matter in good time, because the display reports a fault in the restraint system.

Which vehicles is the 77960-SWA-N811-M1 fitted in?

The airbag control unit 77960-SWA-N811-M1 is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

You will find an overview of the allocation here:

• Honda CR-V 3 RE (2006-2012)

Compare the part number on the label of the removed unit with this page to be sure that you have the correct unit. Then have the fault memory read out, because only this result 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-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-N811-M1 work?

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

Airbag24 checks the control unit on the test bench and repairs defective components. The stored crash data is then deleted and a function test carried out, before your own unit is returned.

The 3–4 working days relate solely to the work at Airbag24. 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-N811-M1 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shock-resistant.