Airbag control unit with part number 77960-SCA-G931-M3

What does the airbag control unit 77960-SCA-G931-M3 do?

The airbag control unit 77960-SCA-G931-M3 acts as the central unit for the restraint system (SRS) of Honda. It evaluates the sensor signals, selects the appropriate airbags and seatbelt pretensioners in a crash and triggers them within milliseconds.

It also monitors the entire system continuously. If it finds a fault, it reports it via the airbag warning light in the instrument cluster. After a crash the unit stores crash data and locks itself. This lock can only be ended by a repair.

In everyday life you notice nothing of this as long as the system is in order. Only warning indicators show that the electronics need help.

Why does the control unit 77960-SCA-G931-M3 fail?

Most often the cause is stored crash data, even when no airbag has fired. These data cannot be erased with a common diagnostic tool, so the fault persists.

In addition, ageing of the electronics, cold solder joints, moisture at the plug connections and voltage spikes play a role. A weak battery or a jump start in particular can cause such voltage spikes.

Without an examination an exact assignment is not possible, so in individual cases the cause remains open until the unit has been examined.

How can you tell that the 77960-SCA-G931-M3 is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently, along with messages in the instrument cluster. In addition there are connection problems with the diagnostic tool and a fault memory that cannot be cleared.

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be erased

If these signs occur, expect a restriction: airbags and seatbelt pretensioners may possibly not trigger in an emergency. Have the situation checked promptly.

Which vehicles is the 77960-SCA-G931-M3 fitted in?

The control unit 77960-SCA-G931-M3 is fitted in these vehicles: Honda CR-V 2 RD (2001-2006).

The details come from our stock for this part number.

• Honda CR-V 2 RD (2001-2006)

Have the fault memory read out before removal. Then compare the number on the label of the unit with the part number, so that it can be told whether the control unit or, for example, a cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 77960-S9A-A924-M1, 77960-SWA-G214-M4.

How does the repair of the 77960-SCA-G931-M3 work?

Before the unit is removed, the fault memory should be read out and the log placed in the parcel. You disconnect the battery, take out the unit, create the repair order online and send it in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit, repairs defective components, removes the crash data and tests the function. The stated period covers only this work at Airbag24 and not your preparations or the shipping. Afterwards you receive your own, repaired unit back.

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-SCA-G931-M3 get to Airbag24?

The unit goes either as a parcel to Airbag24, or you book a UPS collection for an extra charge. The return journey is handled by UPS: after the repair, Airbag24 sends the control unit back to you.

Enclose a printout of the repair order with the parcel, and the unit must be shock-resistant.