Connecting an Ftdi Based Obd2 Diagnostic Cable to your vehicle should be a straightforward process, but sometimes issues arise that can prevent a successful connection. This article will delve into common problems encountered when using these cables, specifically focusing on compatibility issues with Tunerpro software and offering potential solutions.
While device drivers often recognize the FTDI based OBD2 diagnostic cable and assign a virtual COM port, Tunerpro might still fail to establish communication. This can be frustrating, especially when attempting to diagnose vehicle issues like intermittent stalling or rough running, as described with a 1994 Chevy 4.3 TBI pickup. Even when no error codes are present, using a diagnostic tool is crucial for identifying the root cause.
One potential culprit is driver incompatibility. Different versions of FTDI drivers (e.g., 2.08.14, 2.10, and 2.12) can yield different results. Although newer versions might offer improvements, they can sometimes introduce compatibility problems with older software or specific hardware configurations. Even if the cable utilizes a genuine FTDI chip (indicated by a USB PID flag of x6001), driver conflicts can still occur.
Troubleshooting steps include systematically testing various FTDI driver versions, ensuring the correct COM port is selected within Tunerpro, and trying different ADX files compatible with the vehicle’s protocol (e.g., $0D mask for the 1994 Chevy). It’s crucial to verify the cable’s functionality independent of Tunerpro. Direct connection using terminal software like RealTerm or Hyperterminal, with settings at 9600/8/N/1, can indicate whether the cable transmits data when connected to the vehicle with the ignition on. Absence of data suggests a potential cable malfunction or a persistent driver issue.
Further troubleshooting involves testing the FTDI based OBD2 diagnostic cable on different computers with different operating systems (e.g., Windows 7, Windows 10) to isolate potential software conflicts. If issues persist across multiple systems, a hardware problem with the cable becomes more likely.
Finally, consider using alternative diagnostic methods. Utilizing a USB OTG cable to connect the FTDI based OBD2 diagnostic cable to a smartphone or tablet with a compatible app (e.g., ALDL Droid) can help determine if the problem lies with the cable itself or the computer software configuration. If the cable fails to function with multiple devices and software, replacing the cable is likely the necessary solution. Always ensure compatibility between the diagnostic cable, software, and the vehicle’s OBD2 protocol before making a purchase. A properly functioning FTDI based OBD2 diagnostic cable is an essential tool for accurate vehicle diagnostics and repair.
