Airbag control unit with part number JW93-14D374-AC

What does the airbag control unit JW93-14D374-AC do?

In the vehicle from Jaguar, the airbag control unit JW93-14D374-AC takes over control of the restraint system (SRS). It reads the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners fire, and monitors the system permanently. It reports faults via the airbag warning light.

For this purpose, the electronics evaluate the signals from several sensors and check continuously whether all components of the system respond. Seatbelt pretensioners and airbags thus remain under observation.

After an accident, the unit stores crash data and locks itself.

Why does the control unit JW93-14D374-AC fail?

Most often, the cause lies in crash data that remained in the memory after an accident, even without an airbag firing. A normal diagnostic tool cannot delete this data. In addition there are ageing electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data stays stored in the control unit, even if the accident was minor and no airbag fired.

A conventional diagnostic tool does not reach it, which is why Airbag24 removes it specifically during the repair.

Further causes are generally ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump-start.

How can you tell that the JW93-14D374-AC is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently in the event of a fault on the JW93-14D374-AC. In addition, there is a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared. As a result, the airbags and seatbelt pretensioners may possibly not fire in an emergency.

The light displays exactly the condition in question, and it must therefore not be ignored.

A fault message or a connection problem with the diagnostic tool points to a fault that requires a check.

Which vehicles is the JW93-14D374-AC fitted in?

The control unit JW93-14D374-AC is fitted in this vehicle from Jaguar: Jaguar XJ X351 (2009-2019).

The assignment stored for this part number follows below.

• Jaguar XJ X351 (2009-2019)

Comparing the part number with the label on the removed control unit confirms that it is the right unit. It does not clarify the cause; for that, you need to have the fault memory read out. Only the result shows whether the control unit or a plug or cable is affected.

For the same vehicles, we also repair control units with the part numbers C2D5633.

How does the repair of the JW93-14D374-AC work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit JW93-14D374-AC. Next, create a repair order online and send in the unit well packed.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Afterwards your own, repaired unit goes 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 JW93-14D374-AC get to Airbag24?

You send the control unit JW93-14D374-AC to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Enclose the printed repair order and pack the control unit shock-proof.