Airbag control unit with part number 77960-SWA-E220-M4

What does the airbag control unit 77960-SWA-E220-M4 do?

The control unit 77960-SWA-E220-M4 manages the restraint system in Honda vehicles. In a collision it evaluates the crash sensors and determines which airbags and seatbelt pretensioners fire within milliseconds.

It also checks the system continuously. It stores any faults it finds and shows them via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself.

Why does the control unit 77960-SWA-E220-M4 fail?

For the 77960-SWA-E220-M4, stored crash data is the most common cause, even if no airbag has deployed in the accident. Aged components, moisture at plug connections and voltage spikes are added to this.

A normal diagnostic tool does not remove this crash data. During the repair, Airbag24 removes it.

The other causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery

How can you tell that the 77960-SWA-E220-M4 is defective?

A defect in the 77960-SWA-E220-M4 shows itself first through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Error messages, a missing connection to the diagnostic tool or a fault memory that cannot be cleared may also appear.

Such signs mean that airbags and seatbelt pretensioners may not fire in an emergency. The light makes the fault visible and makes sure it is not overlooked.

If the light goes out after starting, this is no proof that the memory is empty. Only reading out shows what is actually stored.

Which vehicles is the 77960-SWA-E220-M4 fitted in?

The control unit 77960-SWA-E220-M4 is fitted in these vehicles: Honda CR-V 3 RE (2006-2012). If your car is listed here, the unit is recorded for your model.

The following overview lists the models to which we have assigned this unit.

• Honda CR-V 3 RE (2006-2012)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit.

Have the fault memory read out beforehand. 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-E220-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit 77960-SWA-E220-M4. Processing at Airbag24 takes 3–4 working days as a rule.

This order is mandatory for safety reasons. Then create a repair order online and pack the unit well.

Airbag24 checks the unit, replaces defective components, deletes the stored crash data and carries out a function test. Afterwards, the unit is returned 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-E220-M4 get to Airbag24?

Send the control unit 77960-SWA-E220-M4 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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