Airbag control unit with part number CJ5T-14B321-AF

What does the airbag control unit CJ5T-14B321-AF do?

The airbag control unit CJ5T-14B321-AF is the central processing unit of the restraint system (SRS) in Ford vehicles. It records the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and checks the system continuously.

If it detects a fault, it stores it in memory and shows it via the airbag warning light. If an accident is registered, it saves the crash data and then locks itself. Only the repair lifts this lock.

The device works in the background throughout the journey and evaluates the measurements continuously.

Why does the control unit CJ5T-14B321-AF fail?

Crash data stored after an accident is the most common cause on the CJ5T-14B321-AF, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Stored crash data cannot be removed with a usual diagnostic tool. As long as it is in memory, the system keeps reporting the fault, even if the journey afterwards is completely normal.

The other causes act over a longer period. Aged components, cold solder joints and corrosion gradually alter the connections, while a weak battery or a jump start briefly applies voltages that are too high.

How can you tell that the CJ5T-14B321-AF is defective?

The airbag warning light in the instrument cluster lights up on the CJ5T-14B321-AF permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In these cases, airbags and seatbelt pretensioners may not be able to trigger in an emergency.

If the airbag warning light stays on permanently or flickers, that is a sign you should take seriously. The warning light is the clearest indication that the system has detected a fault.

A fault memory that cannot be emptied also points to the control unit. A precise evaluation by a specialist workshop will then provide clarity.

Which vehicles is the CJ5T-14B321-AF fitted in?

The part number CJ5T-14B321-AF belongs to the following models of Ford in which the control unit is installed: Ford Escape 3 (2013-2019).

The models are listed in the overview:

• Ford Escape 3 (2013-2019)

Comparing the part number on the label only shows that you have the correct unit in front of you. Having the fault memory read out beforehand gives the answer as to whether the control unit is defective or a plug or cable is behind the problem.

For the same vehicles, we also repair control units with the part numbers CJ5T-14B321-AH, CJ5T-14B321-AJ, CJ5Z-14B321-C, FJ5T-14B321-AA, GJ5Z-14B321-B.

How does the repair of the CJ5T-14B321-AF work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit CJ5T-14B321-AF. Next, create a repair order online and send the unit in well packed.

At Airbag24 the unit is first checked on the test bench for its condition. Defective components are replaced, crash data is erased and a function test is carried out. Afterwards you receive your own unit back.

At Airbag24 processing usually takes 3–4 working days. This period covers testing, repairing and checking only.

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 CJ5T-14B321-AF get to Airbag24?

Either you send the control unit CJ5T-14B321-AF as a parcel, or you book a UPS collection for an extra charge. The return shipment after the repair is also made by UPS.

The printed repair order belongs in the parcel. Also pack the unit so that it withstands knocks.