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JDiag Manuals & User Guides

JDiag specializes in intelligent automotive and motorcycle diagnostic tools, including OBDII scanners, battery testers, and TPMS relearn devices.

Tip: include the full model number printed on your JDiag label for the best match.

About JDiag manuals on Manuals.plus

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.

JDiag manuals

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JDiag FasTPMS Super EL50448 User Manual

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User manual for the JDiag FasTPMS Super EL50448, a TPMS relearn tool compatible with GM and Ford vehicles. Provides instructions on switching modes, using the device, and setting cars into…

JDiag M300 Software Update Guide

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Detailed instructions for updating the JDiag M300 device software. This guide covers connecting the device, unzipping firmware, copying files, and completing the automatic upgrade process via your motorcycle's power.

JDiag M100 Moto Scanner User's Manual

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Comprehensive user manual for the JDiag M100 Moto Scanner, a universal motorcycle scan tool. Covers safety precautions, features, functions, operation instructions for diagnosis, battery testing, module tests, setup, and update…

JDiag manuals from online retailers

JDIAG 2IN1 TPMS Relearn Tool Super EL50448 Instruction Manual

Super EL50448 • September 1, 2025
Comprehensive instruction manual for the JDIAG 2IN1 TPMS Relearn Tool Super EL50448, providing detailed setup, operating procedures, compatibility, troubleshooting, and specifications for GM and Ford vehicle tire pressure…

JDIAG JD001 OBD2 Scanner User Manual

JD001 • 29 Jolay 2025
JDIAG JD001 OBD2 Scanner Professional Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for Cars Since 1996 Easy to Read and Clear False Code with DTC Lookup,…

JDIAG EL-50448 TPMS Relearn Tool User Manual

EL50448 • 24 Jolay 2025
Comprehensive user manual for the JDIAG EL-50448 TPMS Relearn Tool, providing instructions for setup, operation, maintenance, and troubleshooting for GM series vehicles including Buick, Chevy, and Cadillac.

JDIAG EL-50448 TPMS Relearn Tool User Manual

EL-50448 • 23 Jolay 2025
Comprehensive user manual for the JDIAG EL-50448 TPMS Relearn Tool, covering setup, operation, maintenance, and troubleshooting for Buick, Chevy, and Cadillac vehicles.

JDIAG EL-50449 TPMS Relearn Tool User Manual

EL-50449 • 6 Jolay 2025
The JDIAG EL-50449 TPMS Relearn Tool is an essential device designed to activate and reset Tire Pressure Monitoring System (TPMS) sensors in a wide range of Ford, Lincoln,…

JDiag P100 Electrical Circuit Tester User Manual

P100 • February 4, 2026
Comprehensive instruction manual for the JDiag P100 Electrical Circuit Tester, covering setup, operation modes, diagnostic functions, specifications, and maintenance for automotive electrical systems.

JDiag P100 Automotive Circuit Tester User Manual

P100 • 30 Janoary 2026
Comprehensive user manual for the JDiag P100 Automotive Circuit Tester, covering setup, operation, maintenance, troubleshooting, and specifications for 12V-24V car electrical systems.

JDiag M200 Pro Motorcycle Diagnostic Scanner Instruction Manual

M200 Pro • 21 Janoary 2026
Comprehensive instruction manual for the JDiag M200 Pro Motorcycle Diagnostic Scanner, covering setup, operation, maintenance, troubleshooting, specifications, and features like ECU remap, battery testing, and signal simulation.

JDiag M200 Pro Universal Motorcycle Scanner User Manual

M200 Full Version • January 3, 2026
Comprehensive user manual for the JDiag M200 Pro Full Version Multilingual Universal Motorcycle Scanner, detailing setup, operation, maintenance, troubleshooting, specifications, and warranty.

JDiag BT300 Car Battery Tester User Manual

BT300 • 4 Novambra 2025
Comprehensive user manual for the JDiag BT300 Car Battery Tester, covering setup, operation, maintenance, troubleshooting, and specifications for 6V, 12V, and 24V automotive batteries.

JDiag support FAQ

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  • 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.