Diag4 Bike Serial Diagnostic System Software - W/Bluetooth Interface

Diag4 Bike Serial Diagnostic System is a professional-grade diagnostic scanner for Harley-Davidson and Buell workshops that reads and clears fault codes from EFI modules, security systems, ABS, gauges, and other electronic modules. Includes a Bluetooth wireless interface, USB cable, and Windows-compatible software for real-time data monitoring and actuator testing.

Features

• Read and clear diagnostic trouble codes on all modules
• Read identification data including VIN and part numbers
• Monitor real-time engine and system data in live view
• Test actuators: injectors, coils, fuel pump, relays, idle control, and more
• Diagnose EFI, security modules, ABS, gauges, radio, and Thunder MAX systems
• Buell diagnostics integrated into Harley-Davidson platform
• Wireless Bluetooth interface included
• Metric and standard unit selection

Specifications

• Brand: Diag4 Bike
• Manufacturer Part #: AT 531 5091
• Length: 10 in
• Width: 8.5 in
• Height: 3.5 in
• Weight: 3.4 lbs
• Country of Origin: Czech Republic
• Operating System: Windows XP, Vista, 7, 8, 10

Fitment

Designed for Harley-Davidson and Buell workshops and professional tuning centers. Covers all Harley fuel-injected models and Buell motorcycles.

Frequently Asked Questions

What modules can this scanner diagnose?

EFI, ignition, security modules (TSSM, HFSM), body control, gauges, ABS (Delphi and CAN), radio, and Thunder MAX systems.

Does it work with both hardwired and wireless connections?

Yes — the kit includes a USB cable and Bluetooth wireless interface for laptop connectivity.

Can I use this on a Buell?

Yes. Buell diagnostics are fully integrated into the Harley-Davidson diagnostic platform.

Will this work on my Windows 11 computer?

The software is certified for Windows XP through Windows 10. Compatibility with Windows 11 is not guaranteed — contact Diag4 Bike support before ordering if you run Windows 11.

What's included in the box?

The communication interface with Harley adapter, USB cable, Bluetooth wireless module, and Windows diagnostic software.