A Diesel Bidirectional Scan Tool is essential for diagnosing and repairing modern diesel vehicles. This comprehensive guide answers frequently asked questions about these powerful diagnostic tools, covering compatibility, functionality, and troubleshooting.
Understanding Diesel Bidirectional Scan Tools
Diesel engines rely on complex electronic control systems to manage performance and emissions. A bidirectional scan tool allows mechanics to not only read diagnostic trouble codes (DTCs) but also to perform active tests and control various vehicle functions. This functionality makes it possible to pinpoint issues with components like fuel injectors, EGR valves, and DPF systems.
Frequently Asked Questions
Compatibility
Q: Will a diesel bidirectional scan tool work on my vehicle?
A: Compatibility depends on the specific scan tool and the vehicle’s year, make, and model. Most modern diesel vehicles manufactured after 1996 are OBD2 compliant. However, certain functionalities may vary depending on the vehicle. Always consult the scan tool’s coverage guide or compatibility checker before purchase.
Q: Does it work on vehicles outside of the USA and Canada?
A: Many scan tools are designed for specific regional OBD protocols. North American scan tools may not function correctly on vehicles from other regions due to differing standards.
Q: Does the scan tool support FCA vehicles?
A: Many bidirectional scan tools support FCA vehicles, often through integration with AutoAuth for secure access to diagnostic functions.
Q: Will this work on OBD1 vehicles?
A: No, bidirectional scan tools are generally designed for OBD2 (1996-present) vehicles. OBD1 vehicles require different diagnostic equipment.
Functionality
Q: Can a diesel bidirectional scan tool reprogram vehicle computers?
A: No, most bidirectional scan tools do not have reprogramming capabilities. This typically requires specialized software and equipment. Key fob programming is also generally not supported.
Q: Will this work on vehicles that cannot start or crank?
A: No, OBD2 scanners, including bidirectional ones, require the vehicle to at least crank in order to establish communication with the Engine Control Unit (ECU). If the vehicle cannot crank, the scanner will be unable to connect.
Troubleshooting
Q: I can’t scan anything. All the options are greyed out on my tablet.
A: Try disconnecting and reconnecting the VCI cable from the tablet. Ensure the connection points are clean and free of debris. Power cycling the tablet can also resolve this issue.
Q: Does the scan tool tablet need to be charged?
A: Yes, the tablet requires a charge to operate. Most scan tools come with a dedicated charger.
Updates and Costs
Q: How can I update the scan tool tablet?
A: Connect the tablet to a Wi-Fi network and access the settings menu. Look for an “Update” or “Check for Updates” option. Selecting this will initiate the update process if one is available.
Q: Do you charge for updates?
A: Software updates for scan tools are often provided free of charge. However, subscription services for specific features or data may be required.
Conclusion
A diesel bidirectional scan tool is an invaluable investment for any diesel mechanic. By understanding its functionalities, limitations, and troubleshooting techniques, you can maximize its diagnostic power and efficiently repair complex diesel vehicles. Consult the manufacturer’s documentation and support resources for specific guidance on your chosen scan tool.
