The Lincoln Mark VII’s air suspension system, often referred to as BAFS (Best Available Front Suspension), can be a source of frustration when problems arise. One common issue is the lack of diagnostic information related to the air suspension when using a standard OBDII scanner. This article will address why BAFS OBDII data might not be showing up and guide you through troubleshooting the system.
Why Standard OBDII Scanners Don’t Display BAFS Data
The Mark VII’s air suspension system predates the widespread adoption of standardized OBDII diagnostics for all vehicle systems. While a generic OBDII scanner can read engine-related codes, it won’t access the proprietary module controlling the air suspension. This module communicates using a different protocol, making it invisible to standard OBDII tools. Therefore, if you’re experiencing issues with your air suspension, such as the “check air ride” light illuminating, a regular OBDII scanner won’t provide specific information about the problem.
Diagnosing Lincoln Mark VII Air Suspension Problems
While BAFS OBDII data isn’t accessible via generic scanners, several methods can help pinpoint the root cause of air suspension issues:
1. Visual Inspection: Carefully examine the air springs, lines, and solenoids for signs of damage or leaks. Look for cracks, abrasions, or wet spots indicating potential air leaks. With the car safely raised and supported on jack stands, use a soapy water solution to spray these components. Bubbles forming indicate the location of a leak. Remember to check the compressor and dryer assembly connections as well.
2. Manual Air Spring Inflation: If the car isn’t lifting, manually inflate the air springs to determine if they hold pressure. If they deflate quickly, you’ve confirmed a leak in the bags, lines, or fittings.
3. Compressor Test: While a simple 12V test can confirm the compressor motor runs, it’s crucial to test its ability to generate sufficient pressure. Use a pressure gauge to verify the compressor meets the required specifications. A running motor doesn’t guarantee proper air pressure output. Long-term driving with leaks can damage the compressor’s internal components.
4. Solenoid Testing: The solenoids control air flow to the air springs. Test them for proper operation by activating them manually using a suitable power source and observing air flow. Leaky solenoids can often be repaired by replacing their O-rings.
5. Specialized Diagnostic Equipment: For in-depth diagnostics, utilize Ford’s proprietary diagnostic tools like NGS (New Generation Star) or WDS (Worldwide Diagnostic System), or a compatible professional-grade scanner capable of accessing the air suspension module. These tools can read specific fault codes and provide data related to the air suspension system.
Finding the Leak: A Crucial Step
If you suspect a leak, raising the vehicle safely with jack stands is paramount. This allows the air springs to fully extend, revealing leaks that might be concealed when compressed. Soapy water becomes an invaluable tool in this process. Apply it liberally to all air suspension components, including lines, fittings, solenoids, and the compressor/dryer assembly. Observe for bubbling, which pinpoints the leak’s location.
Conclusion
While “Bafs Obdii Not Showing Up” on a standard scanner can be initially discouraging, several diagnostic methods exist to troubleshoot your Lincoln Mark VII’s air suspension. By combining visual inspection, manual testing, and potentially using specialized diagnostic equipment, you can effectively identify and resolve issues, ensuring a smooth and comfortable ride. Remember to prioritize safety when working on your vehicle, and consult a qualified mechanic if you’re unsure about any procedure.
