Airbag control unit with part number 77960-S0X-L812-M1

What does the airbag control unit 77960-S0X-L812-M1 do?

The control unit 77960-S0X-L812-M1 is the airbag control unit for Honda and part of the restraint system (SRS). It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system permanently. It reports a detected fault via the airbag warning light.

Monitoring runs in the background on every journey. If measured values fall outside the expected range, the unit checks them against stored specifications.

After an accident, the unit records crash data and locks itself.

Why does the control unit 77960-S0X-L812-M1 fail?

The most common cause is crash data from an accident, even if no airbag was triggered; an ordinary diagnostic tool cannot erase it. Other causes include aged electronics, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

After an accident, the control unit holds a record of the event, even when no external damage is visible.

Which of the other causes applies in an individual case only becomes apparent on read-out. The list summarises the possibilities:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connectors
• voltage spikes, for example from a weak battery or jump start

How can you tell that the 77960-S0X-L812-M1 is defective?

A defect shows itself through the airbag warning light, through error messages in the instrument cluster and through connection problems with the diagnostic tool. Then airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

• The airbag warning light lights up permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool gets no connection to the control unit.
• The fault memory cannot be cleared.

Each of these signs is a reason to have the vehicle checked.

Which vehicles is the 77960-S0X-L812-M1 fitted in?

In these vehicles the control unit 77960-S0X-L812-M1 is fitted: Honda Odyssey 2nd generation (1999-2003) and 3rd generation (2003-2008). The assignment of the part number remains decisive.

The list below shows the vehicles for which this part number is recorded.

• Honda Odyssey 2nd generation (1999-2003)
• Honda Odyssey 3rd generation (2003-2008)

Comparing the label of the removed unit with this page only confirms that you have the right unit in front of you. Have the fault memory read out beforehand. Only this shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150300-3302, 150300-7710, 77960-S0X-L810-M1, 77960-S0X-L813M1.

How does the repair of the 77960-S0X-L812-M1 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Then create a repair order online and send in the unit well packed.

Removal therefore only starts once the log is available and the battery is disconnected. Then pack the unit carefully before sending it.

At Airbag24, the control unit is examined on the test bench, defective components are replaced, stored crash data is erased, and a functional test is carried out. Processing usually takes 3–4 working days, after which your own unit comes back 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-S0X-L812-M1 get to Airbag24?

You arrange the way to Airbag24 either by parcel yourself or through a UPS collection for an extra charge. Once the repair is complete, Airbag24 returns the control unit to you by UPS.

Include the printed repair order and protect the unit with shock-resistant packaging.