Airbag control unit with part number P56054604AD

What does the airbag control unit P56054604AD do?

The airbag control unit P56054604AD controls the restraint system of Jeep as the SRS control centre. It evaluates the crash sensors and decides in an accident which airbags and seatbelt pretensioners fire. If it detects a fault, it reports this via the airbag warning light.

The evaluation runs continuously in the background, even though you notice nothing of it. This includes checking the connections to sensors and seatbelt pretensioners.

After an accident the unit stores crash data and locks itself. This section only states that fact; causes and process follow in the next sections.

Why does the control unit P56054604AD fail?

Most often the cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase this data. Other causes include general ageing, solder joints, moisture and voltage peaks.

Airbag24 erases the crash data during the repair.

The further causes mainly include:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage peaks, for example from a weak battery or a jump start

Which cause applies is shown only by the check.

How can you tell that the P56054604AD is defective?

If the airbag warning light in the instrument cluster stays on permanently or only intermittently, this indicates a defect. Added to this are error messages in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The warning light is part of the restraint system's warning system and should therefore not be ignored.

So have the fault memory read out promptly.

Which vehicles is the P56054604AD fitted in?

The control unit P56054604AD belongs to Jeep. It is fitted in these vehicles: Jeep Cherokee KK (2008-2012).

The list of vehicles follows below.

• Jeep Cherokee KK (2008-2012)

First compare the part number on the label of the removed unit with this page; that only shows that it is the right unit. Before that, have the fault memory read out, 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 5189278AA, 68025632AK, P04896129AF, P04896129AG, P56038973AE, P56038973AF.

How does the repair of the P56054604AD work?

You have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the well-packed unit in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Only then does your own unit go back to you.

The order of steps on the vehicle is fixed so that work on the electrics stays safe.

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 P56054604AD get to Airbag24?

You send the unit as a parcel or arrange a UPS collection. After the repair, Airbag24 sends the unit back by UPS.

Put the printed repair order into the parcel and make sure the packaging is shock-proof.