JDiag Manuals & User Guides

JDiag Electronics Technology Co., Ltd. is a manufacturer dedicated to automotive and motorcycle diagnostic solutions. The brand offers a comprehensive lineup of professional and DIY tools designed to troubleshoot electronic fuel injection (EFI) systems, battery health, and engine performance. Key products include the M-series universal motorcycle scanners (M100, M200, M300, M400), which provide functions such as ECU reading, fault code clearing, and signal simulation for major brands like Honda, Yamaha, BMW, and Ducati.

In addition to motorcycle diagnostics, JDiag produces automotive scan tools, TPMS activation tools (such as the EL-50448), and advanced circuit testers. These devices are known for their rugged handheld designs, multi-language support, and regular firmware updates, making them essential equipment for vehicle technicians and maintenance enthusiasts worldwide.

• How do I update the software on my JDiag motorcycle scanner?

  To update your device, download the latest firmware package from the official JDiag website (jdiagtool.com/Download). Connect your device to a computer via USB, copy the update files to the device's storage or SD card as instructed in your specific model's user manual.

• What motorcycle brands does the JDiag M-series support?

  The JDiag M-series (M100, M200, M300, etc.) generally supports a wide range of manufacturers including Honda, Yamaha, Kawasaki, Suzuki, BMW, Ducati, KTM, and many others. Adaptor cables are often required for specific brands.

• What is the warranty period for JDiag tools?

  JDiag typically provides a one-year warranty from the date of original purchase, covering defects in material and workmanship, provided the product was purchased from an official channel.

• How do I perform a battery test with a JDiag scanner?

  Connect the device clamps to the vehicle battery (Red to Positive, Black to Negative). Select the 'Battery Test' function from the main menu, choose the battery type (e.g., standard flooded, AGM), and follow the on-screen prompts to run quick or standard tests.