Airbag control unit with part number 68620856AB

What does the airbag control unit 68620856AB do?

The airbag control unit 68620856AB evaluates the sensor data in the restraint system (SRS) of Jeep. In a crash it decides within milliseconds which airbags and seatbelt pretensioners trigger, and it reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

During operation the unit checks its surroundings, that is the sensors, wiring and output stages, and keeps the results in the fault memory.

Crash data form a separate part of the memory and cannot be removed by standard diagnosis.

Why does the control unit 68620856AB fail?

The most common cause is stored crash data after an accident, even if no airbag triggered; they cannot be erased with a normal diagnostic tool. Ageing and moisture problems also play a general role.

Airbag24 removes the crash data during the repair, so this cause can be remedied.

Further causes at a glance:

• Aged electronic components
• Cold 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 68620856AB is defective?

Suspicious signs are an airbag warning light that lights up permanently or only intermittently, an error message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be emptied.

In this case airbags and seatbelt pretensioners may not trigger in a crash. The light indicates the fault even when it comes on only briefly.

Therefore have the fault memory read out before you take further steps.

Which vehicles is the 68620856AB fitted in?

The control unit 68620856AB is fitted in these vehicles: Jeep Grand Cherokee WL (from 2021). The information is based on the data we hold for this unit.

Here is the vehicle list as we currently keep it:

• Jeep Grand Cherokee WL (from 2021)

Compare the part number on the label of your removed unit with this page. That only confirms that you have the right device in hand. Whether the control unit itself is defective or whether a plug or cable is the cause is shown only by the fault memory read out beforehand.

How does the repair of the 68620856AB work?

First read out the fault memory and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online; afterwards send in the well-packed device.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. Afterwards your own unit is returned to you. Processing at Airbag24 usually takes 3–4 working days; this period concerns only checking, repairing and testing.

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 68620856AB get to Airbag24?

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

Enclose the printed repair order and pack the unit shockproof.