Airbag control unit with part number 77960-SWA-G211-M4

What does the airbag control unit 77960-SWA-G211-M4 do?

The airbag control unit 77960-SWA-G211-M4 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors and in an accident decides within milliseconds which airbags and seatbelt pretensioners fire.

During operation the unit checks the entire system. It shows a fault via the airbag warning light in the instrument cluster, so that you keep the condition of the restraint system in view.

After an accident the control unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 77960-SWA-G211-M4 fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. Other causes are:

• ageing electronic components,
• cold solder joints,
• moisture and corrosion on plug connections,
• voltage spikes, for example from a weak battery or jump-starting.

The crash data cannot be erased with a normal diagnostic tool. It remains in the memory until it is removed during a repair.

The list shows that a failure does not always have to be connected with an accident. The electronics themselves and their connections can also be responsible.

How can you tell that the 77960-SWA-G211-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be erased. In an emergency airbags and seatbelt pretensioners may then possibly not deploy.

The warning light is the first thing you will notice. It indicates a problem in the restraint system, even when the vehicle drives normally in everyday use, and so it should not be ignored.

If the lamp stays on after the ignition is switched on, have the system checked. A fault memory that cannot be emptied is likewise a clear sign.

Which vehicles is the 77960-SWA-G211-M4 fitted in?

The control unit 77960-SWA-G211-M4 is fitted in this vehicle: Honda CR-V 3 RE (2006-2012).

The models for which this part number is recorded 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. This only makes sure that you have the right unit. Have the fault memory read out beforehand, because the log shows whether the control unit itself 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-G211-M4 work?

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

Airbag24 checks the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a functional test.

After the repair you receive your own unit back. The 3–4 working days refer only to checking, repair and test run 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-G211-M4 get to Airbag24?

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

Enclose the printed repair order in the parcel and pack the control unit shock-resistant.