Airbag control unit with part number P31340796

What does the airbag control unit P31340796 do?

The airbag control unit P31340796 is the central control unit of the SRS restraint system for Volvo. It evaluates the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system constantly.

The manufacturer's number Bosch 0285011064 is also printed on the housing.

If the unit detects a fault, it reports it via the airbag warning light. After an accident it also stores crash data and locks itself.

Why does the control unit P31340796 fail?

The most common cause: crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Further causes are generally aged components, moisture and voltage spikes.

Aged electronic components and cold solder joints gradually impair the function. This includes the electrical connection at plug connectors, which suffers from moisture and corrosion.

Voltage spikes, for example from a weak battery or a jump start, can stress the electronics. That is why it is worth checking the power supply before every diagnosis.

How can you tell that the P31340796 is defective?

A defect in the control unit P31340796 shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently. In addition, fault messages appear, the diagnostic tool cannot find the control unit, and the fault memory cannot be cleared.

As long as these signs persist, airbags and seatbelt pretensioners may not deploy in a crash. A warning light that stays on permanently belongs in an inspection, not left to wait.

Which vehicles is the P31340796 fitted in?

The P31340796 is fitted in these vehicles: Volvo S60 Y20 (2010-2013) and Y20 Facelift (2013-2018); Volvo V60 1st generation (2010-2013) and 1st generation Facelift (2013-2018).

The following vehicles are recorded for the part number:

• Volvo S60 Y20 (2010-2013)
• Volvo S60 Y20 Facelift (2013-2018)
• Volvo V60 1st generation (2010-2013)
• Volvo V60 1st generation Facelift (2013-2018)

Comparing the part number on the label with this page confirms that you have the correct unit. The question of cause is answered only by the fault memory, which you have read out beforehand. Only it shows whether the control unit is defective or a plug or cable is affected.

For the same vehicles, we also repair control units with the part numbers 285010943, 31476103, 31658440, P 31406637, P31318619, P31334279.

How does the repair of the P31340796 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit.

Then create a repair order online and send in the unit well packed. Airbag24 examines it on the test bench, replaces defective components, clears stored crash data and carries out a function test. Afterwards your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. 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 P31340796 get to Airbag24?

You send the control unit P31340796 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After repair the return is also made by UPS.

The printed repair order goes into the parcel, and you pack the unit shock-proof.