Airbag control unit with part number 68402854AB

What does the airbag control unit 68402854AB do?

The airbag control unit 68402854AB is the central control unit of the SRS restraint system for Jeep. It evaluates the crash sensors, decides in an accident within milliseconds on the airbags and seatbelt pretensioners, and monitors the system permanently. It reports faults via the airbag warning light.

While driving, the unit checks the wiring, sensors and output stages. Detected deviations are stored in the fault memory so that they can be read out and narrowed down.

After an accident, the control unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 68402854AB fail?

The most common cause: crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot delete this data. Other causes include aged electronic components, moisture and corrosion on plug connections, cold solder joints and voltage spikes.

That no airbags were triggered does not mean the unit has stored nothing. Crash data can remain in the memory even without a triggered airbag.

The other causes develop gradually. A moist connector first causes dropouts before it fails completely, and a voltage spike, for example from a weak battery, can damage components.

How can you tell that the 68402854AB is defective?

A defect shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Added to this are an error message in the instrument cluster and no connection between the diagnostic tool and the control unit. In addition, the fault memory cannot be cleared.

In the event of a defect, airbags and seatbelt pretensioners may not trigger in an emergency. Please have the warning checked promptly.

The warning light comes from the system itself and reports the fault directly.

Which vehicles is the 68402854AB fitted in?

The 68402854AB is fitted in these vehicles for Jeep: Jeep Compass MP (2016-2020) and MP Facelift (from 2020).

The overview of vehicles is in the following list:

• 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 ensures that you have the right unit. You should also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a connector 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 68402854AB work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Afterwards, you create a repair order online and send the well-packed unit in.

Airbag24 examines the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Your own unit then comes back 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 68402854AB get to Airbag24?

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

The printed repair order goes into the parcel. Pack the unit so that it is shock-resistant.