1. Introduction
The Konnwei KW906/KW905 ELM327 V1.5 Bluetooth OBD2 Scanner is a powerful diagnostic tool designed to help you understand your vehicle's health. It connects wirelessly to your smartphone or tablet (Android/iOS) via Bluetooth 5.2, allowing you to read and clear diagnostic trouble codes, view live sensor data, perform various tests, and monitor your vehicle's performance.
Package Contents:
- Konnwei KW906/KW905 ELM327 V1.5 Bluetooth OBD2 Scanner Unit
- User Manual (this document)
- Product Packaging Box
Image: Konnwei Bluetooth Car OBD2 Scanner device, user manual cover, and product packaging box.
2. Setup Guide
2.1 Locating Your Vehicle's OBD-II Port
The OBD-II (On-Board Diagnostics II) port is typically located under the dashboard on the driver's side. It can be in various positions (A, B, C, D, E) depending on your vehicle model.
Image: Common locations of the OBD interface in a car.
2.2 Connecting the Scanner to Your Vehicle
- Ensure your vehicle's ignition is off.
- Locate the 16-pin OBD-II diagnostic port in your vehicle.
- Firmly plug the Konnwei OBD2 scanner into the OBD-II port. The device will power on automatically.
- Turn your vehicle's ignition to the 'ON' position (engine can be off).
2.3 App Download and Installation
The Konnwei OBD2 scanner works with the "Car Scanner" app, available for both Android and iOS devices.
- For Android: Download from Google Play Store.
- For iOS: Download from Apple App Store.
Image: App download instructions for Android and iOS.
2.4 Bluetooth Connection
- Open the "Car Scanner" app on your smartphone or tablet.
- Navigate to the app's settings or connection menu.
- Select "Bluetooth LE (4.0+)" as the connection type.
- The app should automatically search for and display the device name "KONNWEI". Select it to connect.
- Once connected, the app will indicate "ELM connection: Connected" and "ECU connection: Connected".
Note: Bluetooth LE (4.0+) is recommended for a stable connection. If connection fails, try re-selecting the device or restarting the app/device.
Video: Demonstration of the Konnwei KW905 OBD2 scanner's app interface, Bluetooth connection, live data display, diagnostic trouble code reading, freeze frame data, and ECU identifiers.
3. Operating Instructions
The Konnwei OBD2 scanner, through the "Car Scanner" app, offers a wide range of diagnostic functions:
Image: Konnwei KW906 app interface showing various functions.
3.1 Core Diagnostic Functions
- Read Codes: Retrieve Diagnostic Trouble Codes (DTCs) from the vehicle's Engine Control Unit (ECU). These codes indicate specific issues detected by the vehicle's self-diagnostic system.
- Erase Codes: Clear DTCs from the ECU. This will also turn off the Check Engine Light (MIL) if the underlying issue has been resolved.
- Live Data: View real-time operational parameters of the vehicle, such as engine RPM, coolant temperature, vehicle speed, fuel system status, and more. Data can be displayed in separate or combined charts for detailed analysis.
- Freeze Frame: When an emission-related fault occurs, the ECU stores certain vehicle operating conditions at the time of the fault. This "freeze frame" data helps in diagnosing the problem.
- I/M Readiness: Check the status of various emission-related monitoring systems to ensure they are ready for an emissions test.
Image: Powerful functions overview.
3.2 Advanced Functions
- O2 Sensor Test: Retrieve O2 sensor monitoring test results for the most recently completed tests from the vehicle's on-board computer.
- Evap Test: Initiate a test of the Evaporative Emission Control System (EVAP) for leaks.
- All Sensors: Access data from all available sensors in your vehicle.
- On-board Monitor Test: Retrieve results for on-board diagnostic monitoring tests for specific components/systems.
- ECU Identifiers: Display vehicle information such as VIN (Vehicle Identification Number), Calibration ID, and Calibration Verification Numbers (CVN).
- Dashboard: Customize a virtual dashboard to display key vehicle parameters in an easy-to-read format.
3.3 Turning Off the Check Engine Light
After diagnosing and fixing a vehicle issue, you can use the "Erase Codes" function to turn off the Check Engine Light (Malfunction Indicator Lamp - MIL). This saves you a trip to a mechanic for simple code clearing.
Image: Check Engine Light on/off illustration.
4. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the scanner in a dry, cool place away from direct sunlight and extreme temperatures.
- Software Updates: The device supports software updates. Ensure your "Car Scanner" app is always updated to the latest version for optimal performance and compatibility with new vehicle models and features.
5. Troubleshooting
- Device not powering on: Ensure the scanner is firmly plugged into the OBD-II port and the vehicle's ignition is in the 'ON' position.
- App not connecting to scanner:
- Verify Bluetooth is enabled on your smartphone/tablet.
- Ensure you have selected "Bluetooth LE (4.0+)" in the app's connection settings.
- Try restarting the app and your device.
- If the device name (KONNWEI) is not appearing, try re-scanning or restarting the scanner by unplugging and replugging it.
- "The CD is broken" / Software installation issues: Due to potential damage during long delivery, the software is available for free download on MEGA. Please contact customer service for the download link or for assistance with installation via TeamViewer.
- No communication with ECU: Ensure your vehicle is OBD-II compliant (most 12V Gasoline and Diesel vehicles after 1996 are). Check that the ignition is on.
6. Specifications
| Feature | Description |
|---|---|
| Brand Name | KONNWEI |
| Model | KW906, KW905 (ELM327 V1.5) |
| Hardware Version | V1.5 |
| Software Version | Latest version |
| Special Features | Bluetooth-Compatible 5.2 |
| Item Type | Code Readers & Scan Tools |
| Certification | CE, FCC, RoHS |
| Supported Vehicles | All 12V Gasoline and Diesel Vehicles after 1996 (OBD-II compliant) |
| Supported Systems | Android, iOS |
| Supported Protocols | ISO 9141, KWP2000, SAE J1850 VPW, J1850 PWM, CAN |
| Language | English (default, changeable via phone settings) |
| Dimensions (L x W x H) | 10cm x 10cm x 10cm (approximate package size) |
| Weight | 0.06 kg (approximate package weight) |
Image: Compatibility information for vehicle models and diagnostic protocols.
7. Warranty and Support
KONNWEI provides ongoing support for its products. Software updates are available to ensure your scanner remains compatible and functional with the latest vehicle technologies.
For any technical assistance, software installation help (e.g., via TeamViewer), or service inquiries, please contact the seller or KONNWEI customer support directly.
8. User Tips
- Software Access: If the physical software CD is damaged during transit, the necessary software can be downloaded from MEGA. Contact customer support for the link.
- Installation Assistance: For complex software installation, KONNWEI engineers can provide remote assistance via TeamViewer.
- Bluetooth LE: Always prefer Bluetooth LE (4.0+) for a more stable and efficient connection with the "Car Scanner" app.
