Airbag control unit with part number 00046862956

What does the airbag control unit 00046862956 do?

The airbag control unit 00046862956 belongs to the restraint system (SRS) of Fiat and Opel and decides which airbags and seatbelt pretensioners fire in a crash. To do this it evaluates the crash sensors and monitors the entire system without a break. If it detects a fault, the fault appears on the airbag warning light; after a crash it stores crash data and locks itself.

The system consists of sensors, wiring and deployment units, all connected to the control unit. The unit checks the connections continuously.

The control unit is therefore the central memory for events in the restraint technology.

Why does the control unit 00046862956 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and this data cannot be cleared with a normal diagnostic tool. Added to this are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Stored crash data is therefore at the top of the list when troubleshooting begins.

Electronic components age, and solder joints can go cold over time. Moisture and corrosion attack the plug connections, which can lead to contact problems.

Voltage spikes also count among the causes, for example from a weak battery or a jump start.

How can you tell that the 00046862956 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, a fault message appears in the instrument cluster, the diagnostic tool cannot find the control unit, or the fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Let's start with the airbag warning light: it shows in the instrument cluster that something is wrong in the restraint system. A constant light and an intermittent one are both signs you should take seriously.

If a fault message also appears in the instrument cluster, or the diagnostic tool makes no contact with the control unit, a check is advisable. A fault memory that cannot be emptied belongs here as well.

Which vehicles is the 00046862956 fitted in?

The airbag control unit 00046862956 is fitted in these vehicles: Fiat Ducato 250 2nd Facelift (2014-2024), 250 (2006-2011), 250 3rd Facelift (from 2023) and 250 1st Facelift (2011-2014); Opel Movano C (from 2021). The list contains the vehicles known for this unit.

The known models are compiled below:

• Fiat Ducato 250 2nd Facelift (2014-2024)
• Fiat Ducato 250 (2006-2011)
• Opel Movano C (from 2021)
• Fiat Ducato 250 3rd Facelift (from 2023)
• Fiat Ducato 250 1st Facelift (2011-2014)

First you should compare the part number on the label of the removed unit with this page; that only confirms you have the right unit. It is also worth having the fault memory read out in advance, since only this result 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 00046858203, 00046858205, 00046859296, 00046859297, 00046863930, 01356790080.

How does the repair of the 00046862956 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create the repair order online and send the unit in. At Airbag24, processing usually takes 3–4 working days.

There, Airbag24 tests the unit on the test bench, replaces defective components, clears stored crash data and runs a function test; after that your own unit is sent back to you.

The order of the steps is for safety and is therefore binding.

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 00046862956 get to Airbag24?

The route is either a parcel that you send in yourself, or a UPS collection that you can book for an extra charge. Airbag24 handles the return shipment by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.