Airbag control unit with part number 77960-SWA-U414-M4

What does the airbag control unit 77960-SWA-U414-M4 do?

As an SRS control unit, the airbag control unit 77960-SWA-U414-M4 controls the safety systems of a Honda vehicle. It evaluates the data from the crash sensors and, in an impact, determines within milliseconds which airbags and seatbelt pretensioners fire. In addition, it constantly checks the system for faults.

After an accident, the control unit stores crash data and locks itself. It makes faults visible via the airbag warning light in the instrument cluster.

Monitoring is part of normal operation and runs without any action by the driver.

Why does the control unit 77960-SWA-U414-M4 fail?

The most common cause is crash data left in the memory after an accident, even without a triggered airbag. A standard diagnostic tool cannot remove this data; Airbag24 deletes it during the repair. Aged components, cold solder joints, and moisture and corrosion at connectors can also contribute.

Voltage spikes also belong to the causes, for example when the battery is weak or a jump start is connected.

Whether several causes combine only becomes clear during the test.

How can you tell that the 77960-SWA-U414-M4 is defective?

A defect in the 77960-SWA-U414-M4 shows up through the airbag warning light, which either stays on constantly or only comes on intermittently. Added to this are an error message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be reset.

In that case, airbags and seatbelt pretensioners may not deploy in an emergency, so take the warning seriously.

A test establishes whether the control unit or another component is causing the fault.

Which vehicles is the 77960-SWA-U414-M4 fitted in?

The 77960-SWA-U414-M4 is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

We list the vehicles stored for this part number below.

• Honda CR-V 3 RE (2006-2012)

Compare the number on the label of the removed unit with this page, so that you can be sure you have the right unit. Also have the fault memory read out, because the log shows whether the control unit itself is defective or whether a connector or cable is behind the fault.

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-U414-M4 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Online, you create the repair order and send in the well-packed unit. Airbag24 checks the unit, replaces defective components, deletes the crash data and carries out a function test, after which your own unit is returned.

At Airbag24, the processing, which covers testing, repairing and checking, 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-U414-M4 get to Airbag24?

You send the control unit 77960-SWA-U414-M4 as a parcel, or you can have it collected by UPS for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel, and the unit must be packed so that it is shock-resistant.