KONNWEI KW340 OBD2 Scanner User Manual

1. Introduction

The KONNWEI KW340 is a powerful and versatile automotive diagnostic tool designed to help you quickly, effectively, and accurately diagnose car faults. It functions as an OBDII/EOBD scanner and a 12V car battery tester, providing comprehensive insights into your vehicle's health. This manual will guide you through the setup, operation, and maintenance of your KW340 device.

Image: KONNWEI KW340 Diagnostic Tool displaying its main functions.

2. Package Contents

Please check the package carefully to ensure all items are present:

• KW340 Unit x1
• 16 PIN OBD2 Cable x1
• Type-C USB Cable x1
• User Manual x1
• Colorful Box x1

Image: Contents included in the KW340 package.

3. Setup and Getting Started

The KONNWEI KW340 is designed for ease of use. No complex setup is needed.

1. Locate your vehicle's OBDII port. This is typically found under the dashboard on the driver's side.
2. Plug the 16-pin OBD2 cable from the KW340 into your vehicle's OBDII port.
3. Turn on the vehicle's ignition (do not start the engine unless instructed by a specific test).
4. The KW340 device will power on automatically and display the main menu.

Video: Demonstration of plugging the KW340 into the OBDII port and initial power-up.

4. Operating Instructions

The KW340 offers a range of diagnostic functions accessible via its intuitive interface. Use the navigation buttons (UP, DOWN, LEFT, RIGHT, OK, ESC) to move through menus and select options.

4.1. Read Trouble Codes

This function allows you to read current, pending, and permanent Diagnostic Trouble Codes (DTCs) from the vehicle's Engine Control Unit (ECU). With over 40,000 built-in DTC lookups, the KW340 can quickly identify and explain the meaning of your check engine light.

4.2. Erase Codes

After addressing a vehicle fault, use this function to clear the DTCs and turn off the Check Engine Light (MIL). Note: Clearing codes does not fix the underlying problem.

4.3. Live Data Stream

View and record real-time datastream information, including engine RPM, temperature, fuel trim, vehicle speed, and more. This helps in monitoring vehicle performance and identifying intermittent issues.

4.4. Battery Check

Checking the voltage of the vehicle's battery and the status of the charging system can help determine whether the battery is running low or if the generator/voltage regulator is faulty. This function provides a quick assessment of your 12V battery's health.

4.5. I/M Readiness

Monitor all emissions systems, including the engine, oxygen sensors, and catalytic converter. This is a quick way to know if your car is ready for a smog or inspection test.

4.6. DTC Lookup

Retrieve check engine codes with one tap – no complex steps or code books required. Quickly get clear fault explanations to judge urgent repairs, saving time and unnecessary shop trips.

Image: The DTC Lookup feature showing a sample code P010.

4.7. Settings Interface

The KW340 supports 9 languages and allows you to freely switch theme colors (white/black). Navigate to the 'Settings' menu to customize these options.

Image: The settings menu displaying language and theme customization options.

5. Maintenance

To ensure the longevity and optimal performance of your KONNWEI KW340, follow these maintenance guidelines:

• Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents.
• Storage: Store the device in a dry, cool place away from direct sunlight and extreme temperatures. Its lightweight, portable design allows it to fit easily in any space, such as a glove compartment or center console.
• Software Updates: The KW340 offers lifetime free software updates. Regularly check for and install updates to ensure compatibility with the latest vehicle models and diagnostic protocols. Connect the device to a PC using the provided Type-C USB cable and follow the instructions on the KONNWEI website for the update process.

Image: Illustration of the lifetime free print and upgrade process for the KW340.

6. Troubleshooting

If you encounter issues with your KW340, refer to the following common troubleshooting tips:

• Device Not Powering On: Ensure the OBDII cable is securely connected to both the vehicle's OBDII port and the KW340. Verify the vehicle's ignition is turned on.
• Communication Error: Check the OBDII cable for any damage. Ensure the vehicle is OBDII compliant (most vehicles manufactured after 1996 are). Try connecting to a different OBDII compliant vehicle to rule out a vehicle-specific issue.
• No Codes Found: If the Check Engine Light is on but no codes are found, ensure the ignition is on and the engine is not running (KOEO - Key On, Engine Off) for reading codes, or running (KOER - Key On, Engine Running) for live data. Some intermittent faults may not store a permanent code immediately.
• Screen Freezes/Unresponsive: Disconnect the device from the vehicle and reconnect it. If the issue persists, perform a software update if available.

7. Specifications

Image: Product dimensions and technical specifications from the device's back label.

8. User Tips

• Always ensure the vehicle's ignition is on when performing diagnostic tests.
• For accurate battery test results, ensure the battery terminals are clean and securely connected.
• When clearing codes, remember that the underlying issue must be resolved first, otherwise the codes will reappear.
• Keep the device's software updated to ensure compatibility with the latest vehicle models and diagnostic protocols.
• The compact size of the KW340 makes it ideal for storing in your glove box or center console for on-the-go diagnostics.

9. Warranty and Support

KONNWEI products are manufactured to high-quality standards. This product comes with a manufacturer's warranty against defects in materials and workmanship. For specific warranty details, technical support, or service inquiries, please refer to the official KONNWEI website or contact their customer service directly. Keep your purchase receipt as proof of purchase.