1. Introduction
The KONNWEI KW310 OBD II/EOBD Scanner is a sophisticated yet easy-to-use diagnostic tool designed to help technicians and car owners accurately diagnose vehicle problems. It supports all 10 OBD II test modes on all OBD II compliant vehicles, making your vehicle service experience much more pleasant.
2. Key Features
The KONNWEI KW310 offers a comprehensive set of diagnostic functions:
- Read Codes: Displays detailed descriptions of Diagnostic Trouble Codes (DTCs).
- Erase Codes & Reset: Turns off the Check Engine Light (MIL), clears codes, and resets monitors.
- Live Data Stream: Reads and displays real-time ECU/PCM data, with graphical plotting capabilities, and stores freeze frame data.
- I/M Readiness Status: Indicates whether various emissions-related systems are operating correctly and are ready for inspection and maintenance testing.
- View Freeze Frame Data: Captures vehicle conditions recorded by the on-board computer at the time an emission-related fault occurs.
- Read Vehicle Information: Displays crucial vehicle details such as VIN (Vehicle Identification Number), CID (Calibration ID), and CVN (Calibration Verification Number).
- Turn off Engine Warning Light: Helps in quickly identifying and resolving issues that trigger the MIL.
- Smoke Emission Check: Assists in verifying emission system performance.
- Engine EPC Check: Provides diagnostic information related to the Electronic Power Control system.
- O2 Sensor Test: Monitors and displays O2 sensor data.
- EVAP System Data: Displays data related to the Evaporative Emission Control System.
- Component Test: Allows for testing of specific components.
- Modules Present: Identifies control modules present in the vehicle.
- Unit of Measure: Configurable units for displayed data.

3. Vehicle Compatibility
The KW310 is designed to work with a wide range of OBD2 compliant vehicles. Please note the following compatibility details:
3.1. Supported Vehicle Types and Regions
- American (USA) Cars: Compatible with Standard OBD2 Cars from 1996 to present, including Chrysler, Ford, GM, and Jeep.
- European Cars: Compatible with Standard OBD2 Cars from 2003 to present, including Alfa Romeo, SAAB, Acura, Opel, Audi, Seat, Bentley, Skoda, Daewoo, Benz, Daihatsu, Land Rover, BMW, Vauxhall, Volvo, VW, Ford, and Jaguar.
- France Cars: Compatible with models after 2006, including Citroen, Fiat, Renault, and Peugeot.
- Asian Cars: Compatible with Standard OBD2 Cars from 2007 to present, including KIA, Isuzu, Honda, Mitsubishi, Hyundai, Dacia, Lexus, Mazda, Nissan, Subaru, Suzuki, and Toyota.
- Chinese Cars: Compatible with Standard OBD2 Cars from 2009 to present, including BYD, Chery, Geely, Great Wall, and Karry.

3.2. Important Compatibility Notes and Exclusions
While the KW310 is broadly compatible, certain vehicles and functions are not supported:
- Russian Cars: Not supported (e.g., VAZ, UAZ, LADA).
- Trucks: Not compatible.
- Specific Ssangyong Models: Not compatible with Actyon (2009-2017), Korando 2.0 TD Diesel (2013-2017), Kyron 2.0 Diesel (2010-2017), Rexton (2011-2017).
- Specific European Models: Not compatible with Opel Corsa C 2004 1.3 CDTI, VW Golf 4 2002, Citroen C4/C5.
- Specific French Models: Not compatible with Renault Clio 2/Megane/Dacia Logan.
- Chevrolet Cars: Not supported.
- Hybrid and Electric Vehicles: Not supported.
- Special Functions: This device only provides standard OBD2 functions. It does NOT support special functions like ABS Reset, Airbag Reset, DPF regeneration, or other advanced system diagnostics beyond engine and emissions.
- Older Vehicles: Compatibility may vary for vehicles that do not fully support the OBD2 protocol, especially some older Japanese and Korean car brands. Ensure your vehicle has a 16-pin OBD port.
4. Supported Protocols
The KONNWEI KW310 supports the following OBD2 communication protocols:
- SAE J1850 PWM (41.6Kbaud)
- SAE J1850 VPW (10.4Kbaud)
- ISO9141-2 (5 baud init, 10.4Kbaud)
- ISO14230-4 KWP (5 baud init, 10.4 Kbaud)
- ISO14230-4 KWP (fast init, 10.4 Kbaud)
- ISO15765-4 CAN (11bit ID, 500 Kbaud)
- ISO15765-4 CAN (29bit ID, 500 Kbaud)
- ISO15765-4 CAN (11bit ID, 250 Kbaud)
- ISO15765-4 CAN (29bit ID, 250 Kbaud)
5. Setup and Connection
To begin using your KONNWEI KW310 OBD2 Scanner, follow these simple steps:
- Locate your vehicle's 16-pin OBD port. This port is typically found under the dashboard on the driver's side.
- Plug the KW310 device firmly into the vehicle's 16-pin OBD port.
- The device will automatically power on once connected to the vehicle's OBD port.
- Follow the on-screen instructions to navigate the menus and perform diagnostic tests.

6. Operation
The KW310 features an intuitive interface with dedicated buttons for navigation:
- ESC Button: Used to go back to the previous menu or exit a function.
- ENTER Button: Used to confirm a selection or enter a menu.
- Arrow Buttons (Up/Down/Left/Right): Used to navigate through menu options and data displays.
6.1. Main Menu Functions
Upon powering on, the main menu provides access to:
- Diagnostics: Access all OBD2 diagnostic functions.
- DTC Lookup: Look up definitions of Diagnostic Trouble Codes.
- Review Data: View previously recorded data.
- System Setup: Configure device settings (e.g., language, units).
- Tool Information: View device details.
6.2. Diagnostic Menu Functions
Within the Diagnostics menu, you can perform various tests:
- Read Codes: Retrieve current, pending, and permanent DTCs.
- Erase Codes: Clear DTCs and turn off the Check Engine Light.
- Live Data: Monitor real-time sensor data.
- View Freeze Frame: Access a snapshot of vehicle conditions when a fault occurred.
- I/M Readiness: Check emission system status.
- O2 Monitor Test: Evaluate oxygen sensor performance.
- On-Board Mon. Test: Access results of on-board diagnostic monitoring tests.
- Component Test: Initiate tests of specific components.
- Vehicle Info.: Display vehicle identification details.
- Modules Present: List communication modules.
- Unit of Measure: Select preferred measurement units.


7. Supported Languages
The KONNWEI KW310 supports multiple languages for user convenience:
- English
- Russian
- Deutsch (German)
- Spanish
- French
- Dutch
- Portuguese


8. Maintenance
The KONNWEI KW310 is a low-maintenance device. To ensure its longevity and proper functioning:
- Keep the device clean and free from dust and moisture.
- Store it in a dry, cool place when not in use.
- Avoid dropping the device or subjecting it to strong impacts.
- Do not attempt to disassemble or repair the device yourself, as this will void the warranty.
- The device does not support software updates.
9. Troubleshooting
If you encounter issues with your KW310 scanner, consider the following:
- No Power: Ensure the device is securely plugged into the vehicle's 16-pin OBD port. The vehicle's ignition should be in the 'ON' position (engine off or running).
- Communication Error: Verify that your vehicle is OBD2 compliant and that the OBD port is functioning correctly. Some older vehicles or specific models (refer to compatibility section) may not be fully supported.
- Incorrect Readings/Functions: Double-check that you are selecting the correct menu options. Remember, this device is for standard OBD2 engine and emissions diagnostics only; it does not perform special functions like ABS, Airbag, or DPF resets.
- Device Not Working with Specific Car: If your car has a 3-pin connector instead of a 16-pin OBD2 port, this scanner will not work. Always ensure your vehicle has the standard 16-pin OBD2 interface.
10. Specifications
| Attribute | Value |
|---|---|
| Brand Name | KONNWEI |
| Item Type | Code Readers & Scan Tools |
| Origin | Mainland China |
| Certification | CE |
| Hardware Version | Newest |
| Software Version | Newest |
| Software Update | No |
| High-concerned chemical | None |
| Length | 11 cm |
| Width | 15 cm |
| Height | 21 cm |
| Weight | 0.25 kg |
11. User Tips
- The KW310 is generally compatible with a wide range of standard OBD2 cars, including popular models like the Toyota Corolla.
- Always ensure your vehicle has the standard 16-pin OBD2 diagnostic port for proper connection. Devices with 3-pin connectors are not compatible.
- When viewing live data, the device typically displays information in a black and white graphical format.
- This scanner is primarily for reading and clearing engine fault codes and viewing live data. It does not perform advanced diagnostics or resets for systems like ABS or airbags.
12. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product or contact KONNWEI customer service. Keep your purchase receipt for warranty claims.





