Ford Escape 3 airbag control unit repair

What is a Ford Escape 3 airbag control unit?

The airbag control unit is the central unit that controls the restraint system (SRS) in the Ford Escape 3. It evaluates the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners deploy, and makes faults visible through the airbag warning light.

All the decisions that help determine the protection of the occupants in an emergency come together in this one unit, which is installed in the Ford Escape 3 (2013 to 2019). The crash sensors continuously feed it measured values, and it evaluates them so quickly that the right restraints can fire in time.

For this to work reliably, the control unit monitors itself and the connected components throughout operation. If it detects a fault, it switches on the airbag warning light. After an accident it stores the crash data and locks itself.

Why is the Ford Escape 3 airbag control unit defective?

The most common cause is crash data stored in the unit after an accident, even if no airbag deployed. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at the connectors, and voltage spikes.

An ordinary diagnostic tool cannot delete stored crash data. The control unit therefore keeps reporting a fault, even though the other parts of the system may be working perfectly.

Regardless of an accident, the electronics themselves also change: components age, solder joints lose contact over time, and moisture makes connectors corrode, so that signals do not arrive cleanly. A weak battery or jump-starting can produce voltage spikes that put additional stress on sensitive circuits.

A defect usually shows itself in that the airbag warning light stays on permanently, the fault memory cannot be reset, or the diagnostic tool cannot establish a connection at all.

Common error codes for Ford Escape 3 airbag control unit repair

In the Ford Escape 3, the typical error codes point to internal and memory faults of the control unit, to interrupted communication, to stored crash data, and to interruptions in the firing circuits of the front airbags. They are read from the fault memory with a diagnostic tool.

These codes are known for the Ford Escape 3:

• B1342 → Internal fault in the airbag control unit
• U2017 → Memory fault in the restraint system control unit
• B1231 → Crash event memory full, accident data stored
• U0151 → Communication with restraint system control unit lost
• B0001 → Driver front airbag first stage, firing circuit interrupted
• B0002 → Driver front airbag second stage, firing circuit interrupted
• B0010 → Passenger front airbag first stage, firing circuit interrupted
• B0011 → Passenger front airbag second stage, firing circuit interrupted

A diagnostic tool reads out the codes, but a single entry does not yet prove that the control unit itself has failed. A connector, wiring or an airbag module may equally be the cause. Only testing the unit that has been sent in shows where the fault actually lies.

What part numbers are available for the Ford Escape 3 airbag control unit repair?

You will find the part number on the label of the control unit; it defines its exact version. Because equipment and year of manufacture differ, several numbers occur within the model series.

The following numbers are known for the Ford Escape 3, although the list need not be complete:

• CJ5T-14B321-AF
• CJ5T-14B321-AH
• FJ5T-14B321-AA
• CJ5T-14B321-AJ
• CJ5Z-14B321-C
• GJ5Z-14B321-B

Compare the number on your unit with this list. This only ensures that you have the right unit in your hands; whether it is defective only emerges from reading out the fault memory or from testing at Airbag24.

The route to repair is short. First have the fault memory read out, then disconnect the battery and remove the control unit. After that, create a repair order online and send the unit in. Checking, repairing and testing usually take 3–4 working days at Airbag24.

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.