Airbag control unit with part number 68402850AC

What does the airbag control unit 68402850AC do?

The airbag control unit 68402850AC controls the restraint system (SRS) in Jeep. It evaluates the crash sensors and, in an accident, triggers the appropriate airbags and seatbelt pretensioners within milliseconds. After an accident it stores crash data and locks itself.

In addition, the system is monitored without interruption. Detected faults are signalled via the airbag warning light in the instrument cluster.

If this control fails, the restraint system may no longer work reliably in an emergency, even if the airbags and seatbelt pretensioners themselves are in order.

Why does the control unit 68402850AC fail?

The cause is most often to be found in crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

The fact that no airbag has deployed therefore does not rule out stored data.

The other causes affect the electronics and their connections. Ageing and corrosion act over a longer period, whereas voltage spikes when starting with an external power source intervene quickly.

How can you tell that the 68402850AC is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. An error message also appears in the instrument cluster, while the diagnostic tool cannot establish a connection to the control unit. A fault memory that cannot be erased also indicates the defect.

The light is the most visible sign and deserves attention.

In an emergency, the airbags and seatbelt pretensioners may fail to deploy. Please have the finding checked promptly.

Which vehicles is the 68402850AC fitted in?

The control unit 68402850AC is fitted in these vehicles: Jeep Compass MP (2016-2020) and MP Facelift (from 2020).

The assignment can be seen in the list below:

• Jeep Compass MP (2016-2020)
• Jeep Compass MP Facelift (from 2020)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Before removal, you should have the fault memory read out, because only that shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers A2C13501200.

How does the repair of the 68402850AC work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the well-packed unit; processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards you receive your own unit back.

This time covers only checking, repairing and testing at Airbag24. 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 68402850AC get to Airbag24?

You can send the unit by parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back with UPS.

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