What is a Ford Ka Mk2 airbag control unit?
The Ford Ka Mk2 airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle, a critical component for Ford Ka Mk2 airbag control unit repair.
This module is responsible for controlling the vehicle's passive safety systems. It collects information from crash and acceleration sensors to deploy airbags and seatbelt pretensioners when necessary.
It also stores vehicle-specific data and, after an impact, the so-called crash data. This data is essential for a professional Ford Ka Mk2 airbag control unit repair or module replacement.
Why is the Ford Ka Mk2 airbag control unit faulty?
A defective Ford Ka Mk2 airbag control unit can have various causes. Often, it's an internal error after an accident that results in crash data being stored. However, voltage spikes, moisture damage, or age-related wear can also cause a failure, making a Ford Ka Mk2 airbag control unit repair unavoidable.
After an accident, the airbag control unit stores the crash data and continuously indicates a malfunction. This causes the airbag warning light in the dashboard to illuminate and the system to become inactive.
Internal electronic defects, short circuits, or corrosion can also lead to control unit failure. Such damage requires specialized expertise for Ford Ka Mk2 airbag control unit repair.
Communication problems with other vehicle systems or sensors can also indicate a faulty control unit. A precise diagnosis is crucial here.
Common error codes for Ford Ka Mk2 airbag control unit repair
During Ford Ka Mk2 airbag control unit repairs, specific error codes will occur that signal direct problems with the control unit. These codes range from internal circuit errors and communication problems to stored crash data, which require a module reset and require a precise diagnosis to resolve.
Reading these codes is the first step in troubleshooting and repairing the airbag control unit:
- B0001: Driver side airbag circuit fault → Usually high resistance or open circuit → Airbag control unit ECU internal.
- B0002: Driver airbag second stage → Airbag stage deployment error → Airbag control unit ECU related.
- B0003: Driver airbag deployment control malfunction → Airbag ECU internal error.
- B0020: Passenger side airbag circuit problem → Airbag control unit ECU error.
- B0028: Second stage passenger airbag error → Airbag control unit ECU error.
- B1193: Crash data stored in the airbag control unit → control unit must be reset → airbag control unit ECU.
- U3000: Control unit error or general error → Airbag ECU.
- U2017: Communication error → airbag control unit and vehicle network.
- B12: Low battery voltage → Airbag control unit internal monitoring error.
- B13: Short circuit in the airbag control unit → short circuit to ground or supply.
- B14: Short circuit primary crash sensor → communication error with control unit.
- B21: Diagnostic monitoring error → Airbag control unit (monitor assembly error).
- B22: Interlock function output circuit failure → Safe Center Output Circuit Failure.
- B23: Memory clear circuit not properly grounded → Airbag control unit error.
- B24: System Disarm Error → Control unit internal diagnostic monitor.
What part numbers are available for the Ford Ka Mk2 airbag control unit repair?
For Ford Ka Mk2 airbag control unit repairs, specific OEM part numbers are crucial to ensure compatibility. The most common are 51889815 and 51925901, the latter often associated with the Bosch/Continental supplier number A2C30469900. Correct identification of the part number is essential for a successful repair.
These numbers help identify the exact module for your vehicle and ensure the correct repair or replacement.
- 51889815 (Ford OEM): Genuine airbag control unit Ford Ka Mk2.
- 51925901 (Ford OEM): ECU Airbag Control Unit (SRS) / Replacement Module for Ford Ka Mk2.
- A2C30469900 (Bosch/Continental OEM supplier): Linked to Ford part number 51925901 and is a relevant replacement number.
The correct assignment of the part number is of great importance to ensure function and safety after the Ford Ka Mk2 airbag control unit repair.
Many services offer repairs for these modules to extend their lifespan and save costs instead of buying an expensive new part.
Proper installation and reprogramming of the device should always be carried out by a specialized workshop.