Airbag control unit with part number 77960-SWA-D813-M4

What does the airbag control unit 77960-SWA-D813-M4 do?

The airbag control unit 77960-SWA-D813-M4 is the central control unit of the restraint system (SRS) of Honda. In an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered.

To do this, it analyses the signals from the crash sensors. It monitors the entire system continuously and shows faults via the airbag warning light in the instrument cluster. The occupants rely on this control in an emergency.

After an accident the control unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 77960-SWA-D813-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are ageing electronic components, dry solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

• ageing electronic components inside the unit
• dry solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 77960-SWA-D813-M4 is defective?

A fault shows up as the airbag warning light in the instrument cluster, which stays on permanently or flashes intermittently, as an error message in the instrument cluster, or as the diagnostic tool being unable to connect to the control unit. The fault memory also cannot be cleared in that case, and airbags and seatbelt pretensioners may fail to deploy in an emergency.

• Airbag warning light stays on permanently or flashes intermittently
• Error message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

A lit warning light is a clear signal that the restraint system has detected a fault. The finding must therefore be clarified promptly.

Which vehicles is the 77960-SWA-D813-M4 fitted in?

The control unit 77960-SWA-D813-M4 is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

The following list shows the vehicles for which this control unit is recorded.

• Honda CR-V 3 RE (2006-2012)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit in front of you. In addition, have the fault memory read out beforehand, because only this log shows whether the control unit itself 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-D813-M4 work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only then remove the control unit. Afterwards you create the repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

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

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-D813-M4 get to Airbag24?

You send the control unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel, and pack the unit shock-proof.