Airbag control unit with part number P68003421AC

What does the airbag control unit P68003421AC do?

The airbag control unit P68003421AC forms the central control of the restraint system (SRS) in Jeep. It processes the signals from the crash sensors, determines in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system. After an accident it stores crash data and locks itself.

While the system is running, the control unit reports faults via the airbag warning light in the instrument cluster. That way you know if something is wrong with the restraint system.

Why does the control unit P68003421AC fail?

The most common cause is crash data that remains in memory after an accident, even if no airbag was triggered; a normal diagnostic tool cannot remove it. Other faults arise from ageing electronics, faulty solder joints, moisture or corrosion on connectors, and voltage spikes.

Crash data is created regardless of whether an airbag was triggered. A diagnostic tool of this kind cannot erase the data, so the fault persists. Other causes are also possible:

• ageing components in the electronics
• faulty solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the P68003421AC is defective?

An airbag warning light in the instrument cluster that lights up permanently or intermittently is the clearest sign. Added to this are a fault message in the instrument cluster, a missing contact with the diagnostic tool, and a fault memory that cannot be cleared. In these cases, airbags and seatbelt pretensioners may not trigger in an emergency.

The light indicates the defect, regardless of how the vehicle behaves in everyday use. If you see it, have the system checked promptly and do not ignore the warning.

Each of these signs on its own is an indication of a fault in the restraint system.

Which vehicles is the P68003421AC fitted in?

The P68003421AC is fitted in the following vehicles: Jeep Wrangler JK (2007-2018). The list shows whether your vehicle is among them.

In detail, these are the following vehicles:

• Jeep Wrangler JK (2007-2018)

Compare the part number on the label of the control unit with this page. This comparison only shows that you have the correct unit, not what the fault is. Therefore have the fault memory read before removal, because only the reading shows whether the control unit itself is defective or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 68398609AB, P68003421AB.

How does the repair of the P68003421AC work?

For the P68003421AC, proceed as follows: first read out the fault memory and enclose the log, then disconnect the battery and only after that remove the control unit. Then create a repair order online and send in the well-packed unit.

The log is important so that Airbag24 can trace the fault. At Airbag24 the unit is tested on the test bench, defective components are repaired, the stored crash data is deleted and a function test is run. Processing usually takes 3–4 working days. Afterwards your 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 P68003421AC get to Airbag24?

You send the control unit P68003421AC as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.