Airbag control unit with part number 77960-SWA-Q810-M4

What does the airbag control unit 77960-SWA-Q810-M4 do?

The airbag control unit 77960-SWA-Q810-M4 coordinates the restraint system (SRS) for Honda. In a crash, it processes the readings from the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. During normal operation, it monitors all components and shows faults via the airbag warning light.

If an accident happens, the unit creates crash data and then locks itself. This lock only ends with the repair.

The ongoing self-test covers sensors, wiring and output stages. Faults found are stored in the fault memory.

Why does the control unit 77960-SWA-Q810-M4 fail?

The most common cause is crash data stored from an earlier accident, even if no airbag has deployed. A standard diagnostic tool cannot remove this data. Other causes include ageing components on the circuit board, cold solder joints, moisture or corrosion at plugs, and voltage spikes, for example from a weakened battery or from jump-starting the car.

Airbag24 removes the crash data during the repair, and the unit is fully checked in the process.

Which of the other causes applies only becomes clear from the test on the test bench.

How can you tell that the 77960-SWA-Q810-M4 is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently, as an error message in the instrument cluster, as the diagnostic tool having no connection to the control unit, or as a fault memory that cannot be cleared. In all these cases, airbags and seatbelt pretensioners may fail to deploy in an emergency.

The warning light is the sign that is noticed first in the vehicle, and it demands attention. It must not be ignored.

A warning in the instrument cluster is therefore a reason to have the electronics checked promptly.

Which vehicles is the 77960-SWA-Q810-M4 fitted in?

The airbag control unit 77960-SWA-Q810-M4 is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

The assignment to individual models can be found here:

• Honda CR-V 3 RE (2006-2012)

Compare the part number on the label of the removed unit with this page. That only ensures that it is the right unit, nothing more. Also have the fault memory read out before removal; only this result shows whether the control unit is defective or whether a plug or a 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-Q810-M4 work?

First comes reading out the fault memory, and you enclose its log with the unit. Only then disconnect the battery and remove the control unit 77960-SWA-Q810-M4. Finally, create a repair order online and send the unit in.

Airbag24 then checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. After that, the unit comes back to you. Processing at Airbag24 usually takes 3–4 working days.

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-Q810-M4 get to Airbag24?

Shipping is either as a parcel or via a UPS collection for an extra charge. The return after the repair also runs via UPS.

The printed repair order goes into the parcel, and the unit needs shockproof packaging.