What is a Ford Focus ST Mk2 airbag control unit?
The Ford Focus ST Mk2 airbag control unit is the central safety unit that coordinates and activates all occupant restraint systems in the event of an accident. It continuously monitors crash sensors, stores relevant crash data, and ensures precise airbag deployment. Its correct functioning is essential for any Ford Focus ST Mk2 airbag control unit repair.
This electronic module is responsible for controlling and monitoring your vehicle's airbag deployment systems. It is a central component of the passive safety system, reacting in a fraction of a second.
The control unit processes signals from the front, side, and curtain airbags and decides which airbags should be activated in the event of an impact. It is typically manufactured by Bosch and integrated into the vehicle network via the CAN bus.
If you're considering a Ford Focus ST Mk2 airbag control unit repair, understanding its function is essential. Its installation location is usually in the center console or under the dashboard.
Why is the Ford Focus ST Mk2 airbag control unit faulty?
A Ford Focus ST Mk2 airbag control unit often fails because crash data is permanently stored in memory after an accident, causing the system to lock up. Internal electronic faults or age-related wear and tear can also lead to failure. This makes a Ford Focus ST Mk2 airbag control unit repair unavoidable.
The most common reason for failure is the storage of crash data after a collision. This causes the control unit to lock and prevent further airbags from being deployed.
Repair or replacement is then essential to restore the system to full functionality and ensure full safety. Sometimes electrical problems such as surges or short circuits can also damage the sensitive electronics.
This often manifests itself in an illuminated airbag warning light in the dashboard, signaling a fault or failure. A professional diagnostic will help identify the exact cause of the faulty module.
Common error codes for Ford Focus ST Mk2 airbag control unit repair
When diagnosing a faulty Ford Focus ST Mk2 airbag control unit, specific error codes may occur that indicate internal problems or communication failures. These codes help precisely identify the fault and are crucial for a successful Ford Focus ST Mk2 airbag control unit repair. They indicate a module failure.
- B0001 → Driver side airbag circuit error → High resistance or open circuit in the driver side airbag circuit.
- B0002 → Driver side airbag second stage fault → Problem with the driver side airbag second stage circuit.
- B1000 → Control unit communication error → General communication fault of the airbag control unit in the vehicle network.
- B1342 → Crash data stored in the control unit → The control unit is blocked after an accident and requires a reset or repair.
These codes refer exclusively to problems within the airbag control unit itself. They are therefore important indicators of a necessary repair or replacement of the airbag ECU.
The precise interpretation of these error codes is essential for targeted troubleshooting in the workshop. They enable a precise diagnosis of the control unit problem.
What part numbers are available for the Ford Focus ST Mk2 airbag control unit repair?
For Ford Focus ST Mk2 airbag control unit repairs, specific OEM part numbers are crucial to ensure exact compatibility with your vehicle. These numbers ensure the correct replacement part or repair is obtained. Accurate identification is important for the successful repair of a failure and efficient workshop work.
The following part numbers are 100% verified and fit the Ford Focus ST Mk2 Airbag Control Unit:
- 4M5T-14B056-BJ: This is a genuine OEM part number from Ford, often in conjunction with Bosch number 0285001552.
- YS4T14B056BA: Another Ford OEM number, also used for Focus airbag control units.
- 9M5T-14B321-BA: This number is confirmed as an OEM part for the airbag control unit of the Focus II (2004-2012).
- 3M5T-15K602-AC: A listed OEM part number in professional spare parts databases for the Ford Focus II.
These part numbers are specifically intended for airbag control units, not sensors or other modules. Bosch is listed as the main supplier for at least one of the variants.
The correct part number is crucial for an accurate diagnosis and successful repair of your defective airbag control unit. Accurate identification of the part number is important for a successful Ford Focus ST Mk2 airbag control unit repair.