Airbag control unit with part number P68233020AA

What does the airbag control unit P68233020AA do?

The P68233020AA is the airbag control unit of the restraint system (SRS) for Fiat. It receives the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It shows detected faults via the airbag warning light in the instrument cluster. The control unit thus links the sensors with the triggers.

After an accident the control unit stores crash data and locks itself. Details on this follow in the next section.

Why does the control unit P68233020AA fail?

The most common cause is the crash data stored after an accident, even if no airbag has deployed; a standard diagnostic tool cannot erase it. In addition there are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains stored in the unit until it is removed during a repair. The usual diagnostic access is not sufficient for this.

The other causes act on the electronics and their contacts. Solder joints can turn cold, components age, and moisture attacks plug connections.

Voltage spikes, for example from a weak battery or when starting with external power, place additional strain on the circuit.

How can you tell that the P68233020AA is defective?

The airbag warning light lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory remains unchanged. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

• Airbag warning light lights up permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot reach the control unit
• Fault memory cannot be cleared

Have such a vehicle checked promptly, even if it otherwise drives without any problems.

Which vehicles is the P68233020AA fitted in?

The P68233020AA is fitted in these vehicles: Fiat 500 312 (2007-2024).

The suitable vehicles are listed in this overview:

• Fiat 500 312 (2007-2024)

You carry out the label comparison with the part number of the removed unit; this only confirms the identity of the unit. Have the fault memory read out before removal. Only this shows whether the control unit is defective or whether a connector or cable is causing the problem.

For the same vehicles, we also repair control units with the part numbers 51782985, 51870005, 51897810, 51918659, 51963734, 519637734.

How does the repair of the P68233020AA work?

First have the fault memory read out and enclose the log, then disconnect the battery. Only after that do you remove the control unit and create a repair order online, which you send in with the well-packed unit. The work at Airbag24, that is checking, repairing and testing, usually takes 3–4 working days.

The check takes place on the test bench. If necessary, Airbag24 replaces defective components, erases the crash data and completes the work with a function 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 P68233020AA get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS. Please enclose the printed repair order in the parcel and pack the unit shock-resistant.

Shock-resistant packing means above all securing the control unit on all sides with material inside the box.