Airbag control unit with part number 77960-SWA-D814-M4

What does the airbag control unit 77960-SWA-D814-M4 do?

The 77960-SWA-D814-M4 controls the restraint system (SRS) of Honda as the airbag control unit. It checks the signals from the crash sensors, selects the right airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system continuously. After an accident it records crash data and locks itself.

If the unit detects a fault, it draws the driver's attention to it via the airbag warning light in the instrument cluster. This warning gives you the direct indication of it.

Why does the control unit 77960-SWA-D814-M4 fail?

The most common cause on the 77960-SWA-D814-M4 is crash data stored after an accident, even if no airbag was triggered. This data cannot be removed with an ordinary diagnostic tool.

Airbag24 removes the crash data during the repair. The other causes lie rather in the electronics themselves: with age, components can weaken, and cold solder joints lead to intermittent contact.

Moisture and corrosion also attack the plug connections, and voltage spikes, for example from a weak battery or a jump start, put additional strain on the unit.

How can you tell that the 77960-SWA-D814-M4 is defective?

The airbag warning light in the instrument cluster indicates a fault on the 77960-SWA-D814-M4 by lighting up permanently or only intermittently. A fault message in the instrument cluster and a disturbed connection to the diagnostic tool may also occur.

These signs can be observed individually or together:

• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory cannot be cleared

As long as such signs persist, airbags and seatbelt pretensioners may fail to trigger in an emergency. Have the cause clarified promptly.

Which vehicles is the 77960-SWA-D814-M4 fitted in?

The control unit 77960-SWA-D814-M4 comes from Honda. It is found in these vehicles: Honda CR-V 3 RE (2006-2012).

This overview shows the allocation:

• Honda CR-V 3 RE (2006-2012)

Comparing the label on the removed unit with this page confirms that you have the right unit. The fault memory read out beforehand is also important, because it shows whether the control unit itself is defective or whether 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-D814-M4 work?

For the repair of the 77960-SWA-D814-M4, first read out the fault memory and enclose the log. Then disconnect the battery, before you remove the control unit. Next, create a repair order online and send the unit in well packed.

At Airbag24 the unit is checked on the test bench, defective components are repaired, the crash data is deleted and a functional test is carried out. Processing 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-D814-M4 get to Airbag24?

You send the control unit 77960-SWA-D814-M4 to Airbag24 as a parcel or have it collected by UPS for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order comes with the parcel, and the unit must be packed shockproof.