1. Introduction
The Konnwei ELM327 V1.5 Bluetooth 5.0 OBD2 Scanner is a compact and powerful automotive diagnostic tool designed to read and clear diagnostic trouble codes (DTCs), display live sensor data, and monitor various vehicle parameters. This device connects wirelessly to your smartphone or tablet via Bluetooth 5.0, providing a convenient way to understand and manage your vehicle's health. It supports all OBD-II protocols, making it compatible with a wide range of 12V gasoline and diesel vehicles manufactured after 1996.
2. Key Features
- Compact and portable design, plugs directly into the OBD-II port.
- Stable wireless connection via Bluetooth 5.0.
- Powered directly by the vehicle's 12V battery, no external power source needed.
- Automatic sleep mode after 30 minutes of no communication, with ultra-low power consumption (less than 10mA).
- Supports all OBD-II protocols for wide vehicle compatibility.
- Fast communication mode, up to 30 PIDs/second.
- Features a true ON-OFF button for manual power control.
- Reads and clears diagnostic trouble codes (DTCs), turning off the "Check Engine" light.
- Displays current sensor data including Engine RPM, Calculated Load Value, Coolant Temperature, Fuel System Status, Vehicle Speed, Short Term Fuel Trim, Long Term Fuel Trim, Intake Manifold Pressure, Timing Advance, Intake Air Temperature, Air Flow Rate, Absolute Throttle Position, Oxygen sensor voltages/associated short term fuel trims, and Fuel Pressure.
3. Specifications
| Attribute | Value |
|---|---|
| Brand Name | KONNWEI |
| Model | ELM327 V1.5 |
| Hardware Version | v1.5 |
| Software Version | Latest Version |
| Language | English (default) |
| Connection Method | Bluetooth 5.0 |
| Support System | For iOS/Android |
| Item Type | Code Readers & Scan Tools |
| Certification | CE |
| Origin | Mainland China |
| Special Features | Other (Diagnostic functions) |
| Software Update | No |
| High-concerned chemical | None |
| Package Length | 15 cm |
| Package Width | 11 cm |
| Package Height | 4 cm |
| Package Weight | 0.066 kg |
| Supported OBD-II Protocols |
|
4. Package Contents
- 1x KW902 Wireless BT5.0 scanner (pic18f25k80 chip set)
- 1x English User Manual
5. Setup Guide
5.1. Connecting to Your Vehicle
- Locate your vehicle's OBD-II diagnostic port. This is typically found under the dashboard on the driver's side.
- Plug the Konnwei ELM327 V1.5 scanner firmly into the OBD-II port. Ensure the device is powered on (check the ON-OFF button if present).
- Turn your vehicle's ignition to the "ON" position (do not start the engine).
5.2. Bluetooth Pairing (iOS Devices)
Important Note for iOS: The iOS system does not support Bluetooth 5.0 ELM327 connection directly from the phone's Bluetooth settings page. You must connect through the diagnostic application.
- Plug the KW901 into the OBD2 interface.
- Open your iPhone's Bluetooth settings to ensure Bluetooth is enabled.
- Open a compatible diagnostic software application (e.g., AUTO Doctor, Accurate app).
- Within the application, navigate to the "Extras" or "Settings" section.
- Select "Connectivity" or "Bluetooth" settings.
- Choose "Bluetooth" as the connection type.
- Click on "Device" or "Search Bluetooth devices" and select "Konnwei" or "V-LINK" from the list.
- Once connected within the app, refresh the software if necessary.
5.3. Bluetooth Pairing (Android Devices)
- Plug the KW901 into the OBD2 interface.
- Go to your Android device's Bluetooth settings and pair with "V-LINK" (default password is "1234").
- Open a compatible diagnostic application (e.g., Torque app).
- Navigate to the app's OBD II adapter settings.
- Choose "Bluetooth" as the connection type.
- Select "V-LINK" as the Bluetooth device.
- Exit the Torque app completely and then re-run it to establish the connection.
6. Operation
Once successfully connected to your vehicle and paired with your device, you can use the diagnostic application to perform various functions:
- Read Diagnostic Trouble Codes (DTCs): Access the "Diagnostic Trouble Codes" section in your app to read both generic and manufacturer-specific fault codes.
- Clear Trouble Codes: If DTCs are present, you can clear them from the vehicle's ECU, which will also turn off the "Check Engine" light.
- View Live Data: Monitor real-time sensor data such as engine RPM, vehicle speed, coolant temperature, fuel system status, and more. This data can be displayed in various formats, including gauges and graphs.
- Freeze Frame Data: View a snapshot of sensor data recorded at the moment a fault code was set, which can help in diagnosing intermittent issues.
- Non-continuous Monitors: Check the status of various vehicle monitoring systems.
- ECU Identifiers: Retrieve information about the Engine Control Unit (ECU) and Transmission Control Unit.
- Data Recording: Some applications allow you to record live data for later analysis.
7. Troubleshooting
7.1. Device cannot find the "KONNWEI" Bluetooth network
- Check if the adapter is powered on (verify the ON-OFF button on the front panel).
- Ensure your vehicle's OBD-II connector is supplying 12-14 volts.
- Confirm that the car ignition is in the "ON" position.
- Try turning off the ignition, removing the adapter from the socket, reinserting it, and then turning the ignition back on.
- Attempt searching for the Bluetooth network using another smartphone, laptop, or tablet to rule out device-specific issues.
7.2. Adapter disconnects during operation
- Ensure that high-power devices are not being charged through the cigarette lighter during adapter operation, as this can cause voltage fluctuations.
- Strong voltage surges in the car's electrical network can affect stability. Verify the OBD-II connector consistently outputs 12-14 volts.
7.3. Adapter cannot connect to the ECU
- Some ECUs may require specific initialization codes for correct connection. Many diagnostic applications have a list of these codes for various car brands. Check your app's settings or documentation.
- Try using different diagnostic applications. Different apps may implement protocols differently, which can affect ECU communication.
- Ensure that only one adapter application is running at a time on your device to avoid conflicts.
- Attempt the connection process again from the beginning (Section 5. Setup Guide).
8. User Tips
- Auto Sleep Mode: The device features an auto-sleep mode that activates after 30 minutes of no communication, conserving your vehicle's battery.
- Language Settings: The default language is English. If you need to change the language, please adjust the settings within your phone's operating system interface, as the app often mirrors this setting.
- Protocol Compatibility: This scanner supports a wide range of OBD-II protocols, including KWP 2000 (ISO14230-4 KWP). If you encounter issues, ensure your vehicle's protocol is listed in the specifications.
- DPF Status: While the scanner can read diagnostic trouble codes and live sensor data, it does not explicitly offer a dedicated "DPF status check" function. However, monitoring relevant sensor data (e.g., exhaust gas temperature, differential pressure) and checking for DPF-related DTCs can provide insights.
- Service Reset: The device is capable of clearing general diagnostic trouble codes. Specific "service reset" functions (e.g., oil change light reset) may depend on the diagnostic application used and the vehicle's make/model.
9. Maintenance
- Keep the device clean and free from dust and moisture. Use a soft, dry cloth for cleaning.
- Store the scanner in a cool, dry 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.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
