Airbag control unit with part number 77960-S0X-A920-M1

What does the airbag control unit 77960-S0X-A920-M1 do?

The airbag control unit 77960-S0X-A920-M1 is the central control unit of the restraint system (SRS) of Honda. It processes the signals from the crash sensors, decides in a crash within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system without interruption. It indicates faults via the airbag warning light.

In the background, the unit continuously compares measured values so that it reacts without delay in an emergency. This continuous monitoring is the core of its task.

After a crash, it stores crash data and locks itself.

Why does the control unit 77960-S0X-A920-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag has been deployed; a normal diagnostic tool cannot remove it. Other causes are aged electronics, cold solder joints, moisture and corrosion, and voltage spikes.

The other causes at a glance:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a jump start or a weak battery

An examination of the unit will establish which of these causes applies.

How can you tell that the 77960-S0X-A920-M1 is defective?

A defect in the control unit 77960-S0X-A920-M1 first becomes noticeable through the airbag warning light in the instrument cluster, when it stays on permanently or intermittently. Accompanying signs are fault messages in the instrument cluster, the diagnostic tool failing to connect to the control unit, or a fault memory that cannot be cleared.

The warning light is the most important everyday warning signal. If the system is disturbed, airbags and seatbelt pretensioners may not trigger in an emergency. A prompt clarification is therefore advisable.

Which vehicles is the 77960-S0X-A920-M1 fitted in?

The control unit 77960-S0X-A920-M1 is fitted in these vehicles: Honda Odyssey 2nd generation (1999-2003). This follows from the part number printed on the unit.

These models are assigned to the part number:

• Honda Odyssey 2nd generation (1999-2003)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the correct unit. Additionally, have the fault memory read out beforehand. Only this finding shows whether the control unit is defective or whether a connector or cable is the cause.

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

How does the repair of the 77960-S0X-A920-M1 work?

Have the fault memory read out first, including the log; then disconnect the battery, and only after that remove the control unit 77960-S0X-A920-M1. Afterwards create the repair order online and send the unit off well packed. Processing at Airbag24 normally takes 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components and carries out a function test. The stored crash data is also erased. Afterwards 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-A920-M1 get to Airbag24?

You send the control unit 77960-S0X-A920-M1 to Airbag24 as a packed parcel, or have it collected by UPS for an extra charge. After the repair, Airbag24 brings it back to you by UPS.

Place the printed repair order in the parcel. Also make sure the packaging is shock-proof.