Airbag control unit with part number P56038952AJ

What does the airbag control unit P56038952AJ do?

For Fiat, control unit P56038952AJ coordinates the restraint system (SRS). It reads the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners fire, and checks the system without pause. If it detects a fault, it indicates this via the airbag warning light.

In everyday use the unit's work hardly stands out, because it monitors sensors, wiring and trigger electronics in the background. If it finds a deviation, it records this in the fault memory.

After an accident the unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit P56038952AJ fail?

Stored crash data is the most common cause, and this applies even when no airbag has been triggered. Added to this are aging electronic components, cold solder joints, moisture or corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

A normal diagnostic tool cannot remove this data. Airbag24 erases it during the repair of the P56038952AJ.

The other causes act gradually: solder joints change over time, and moisture attacks plug connections. Voltage spikes also stress components when the battery weakens or the vehicle is started with external power.

How can you tell that the P56038952AJ is defective?

The airbag warning light in the instrument cluster indicates the fault when it burns permanently or only intermittently. It may come with a fault message, and the diagnostic tool may also find no connection to the control unit. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The light reports the finding immediately. Even if the vehicle runs perfectly, the system may have registered a fault.

If the fault memory cannot be emptied, that is also a sign. Please have the finding checked promptly.

Which vehicles is the P56038952AJ fitted in?

Control unit P56038952AJ is installed in these vehicles: Fiat Freemont 345 (2011-2016). The assignment is based on our data for this part number.

The overview in detail:

• Fiat Freemont 345 (2011-2016)

First compare the part number on the label of the removed unit with this page. That only confirms that you have the correct unit. Beforehand, have the fault memory read out, because only this result shows whether the control unit is defective or whether a plug or cable is behind it.

For the same vehicles, we also repair control units with the part numbers 5WY89130-95128, 68139317AA, 68139317AC, 68163811AA, A2C81542500, P56038952AE.

How does the repair of the P56038952AJ work?

For the P56038952AJ, first read out the fault memory and attach the log. Then disconnect the battery, and afterwards remove the control unit. Finally, create a repair order online and send the unit in well packed. Airbag24 usually needs 3–4 working days for testing, repair and functional testing.

Airbag24 checks the control unit on the test bench, repairs defective components, erases stored crash data and carries out a functional test. 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 P56038952AJ get to Airbag24?

You send control unit P56038952AJ as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel, and pack the unit shockproof.