Airbag control unit with part number P68148040AB

What does the airbag control unit P68148040AB do?

The airbag control unit P68148040AB controls the restraint system (SRS) in Jeep. In a collision it evaluates the messages from the crash sensors and determines which airbags and which seatbelt pretensioners are triggered. At the same time it checks the system continuously and shows faults via the airbag warning light.

The unit works closely with the crash sensors and the instrument cluster.

Once the control unit has registered an accident, it stores crash data and then locks itself.

Why does the control unit P68148040AB fail?

Stored crash data from an earlier accident are the most common cause, even if no airbag was triggered. A standard diagnostic tool does not erase them. In addition, aged components, cold solder joints, moisture and corrosion at connectors, and voltage spikes, for example from a weak battery or jump-starting, may play a part.

That no airbag was triggered therefore does not mean that the unit has stored nothing.

The other causes are general in nature: electronics age, solder joints can go cold, and plug connections corrode. Which of them applies to this unit is shown by the test on the test bench.

How can you tell that the P68148040AB is defective?

The airbag warning light in the instrument cluster is the most important sign: it stays on permanently or intermittently, and an error message may appear in the instrument cluster as well. If the diagnostic tool cannot connect to the control unit or the fault memory cannot be cleared, this indicates a defect. In that case airbags and seatbelt pretensioners may not be able to trigger in an emergency.

The light shows the fault. A defect therefore does not stay hidden once the light is on.

Even if the warning appears only intermittently, having the fault memory read out is advisable. Only that reading shows which fault is stored.

Which vehicles is the P68148040AB fitted in?

Check first by the part number whether your vehicle is affected. The control unit P68148040AB is fitted in these vehicles: Jeep Compass MK (2007-2010) and MK Facelift (2011-2016).

In detail, the following vehicles are concerned:

• Jeep Compass MK (2007-2010)
• Jeep Compass MK Facelift (2011-2016)

Compare the number on the label of the removed control unit with this page. This only establishes that it is the matching unit, not whether it is defective. So have the fault memory read out before removal, because only the result shows whether the control unit itself is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers P68186642AD.

How does the repair of the P68148040AB work?

Have the fault memory read out first and enclose the log. Then disconnect the battery and only then remove the control unit; after that, create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

After receipt, Airbag24 checks the unit on the test bench and replaces defective components. The stored crash data are then erased and a function test is carried out, before the unit is returned 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 P68148040AB get to Airbag24?

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

Pack the unit shock-proof and enclose the printed repair order.