Airbag control unit with part number CL34-14B321-BB

What does the airbag control unit CL34-14B321-BB do?

The airbag control unit CL34-14B321-BB works as the central evaluation unit of the restraint system (SRS) of Ford. It evaluates the crash sensors, determines in the event of an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

Detected faults are stored in memory and indicated via the airbag warning light. After an accident the unit records crash data and locks itself; the lock is lifted only by the repair.

Why does the control unit CL34-14B321-BB fail?

With the CL34-14B321-BB, failures are most often due to crash data left in memory after an accident, even if no airbag was triggered. In addition, aged components, cold solder joints, moisture and corrosion at plugs, and voltage spikes are possible causes.

This crash data cannot be removed with a normal diagnostic tool. It remains in the unit until it is properly erased.

Aged electronics, cold solder joints, and moisture and corrosion at the plugs belong to the other causes. Voltage spikes, for example from a weak battery or a jump start, put additional strain on the unit.

How can you tell that the CL34-14B321-BB is defective?

A defect on the CL34-14B321-BB shows through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through error messages in the instrument cluster, through a diagnostic tool without connection to the control unit, and through a fault memory that cannot be cleared.

When the light comes on, airbags and seatbelt pretensioners may fail to deploy in an emergency. A warning of this kind must therefore not be ignored.

A fault can also show only intermittently; the message nevertheless remains a sign of a malfunction in the system.

Which vehicles is the CL34-14B321-BB fitted in?

The vehicles with the control unit CL34-14B321-BB include: Ford F-150 12th generation (2009-2014).

The list below contains the vehicles stored for this number.

• Ford F-150 12th generation (2009-2014)

Compare the number on the label with this page; this only shows that it is the right unit. Whether the control unit itself is defective or a plug or cable is causing the fault is shown only by the fault memory. Have it read out in advance.

For the same vehicles, we also repair control units with the part numbers 9L34-14B321-EK, CL34-14B321-AB, CL3Z-14B321-A, CL3Z-14B321-B, DL34-14B321-BC.

How does the repair of the CL34-14B321-BB work?

First have the fault memory of the CL34-14B321-BB read out and attach the log. Then disconnect the battery, remove the control unit and send it off well packed after creating the repair order online. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is first checked, followed by the replacement of defective components, the deletion of the crash data and a functional test.

The processing time of 3–4 working days refers solely to this work. Finally, the unit returns 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 CL34-14B321-BB get to Airbag24?

You send the control unit CL34-14B321-BB as a parcel to Airbag24, or book a UPS collection for an extra charge. The return after the repair is also made via UPS.

Pack the unit securely to withstand impact and enclose the printed repair order.