KONNWEI ELM327 V1.5 OBD2 Scanner User Manual

1. Introduction

The KONNWEI ELM327 V1.5 OBD2 Scanner is a compact and powerful diagnostic tool designed to connect to your vehicle's On-Board Diagnostics (OBD-II) port. It utilizes a PIC18F25K80 microchip and Bluetooth-Compatible 5.0 technology to communicate wirelessly with your Android or iOS smartphone or tablet. This device allows you to read and clear diagnostic trouble codes, monitor real-time sensor data, and perform various other diagnostic functions to help you understand and maintain your vehicle.

2. Safety Information

• Always operate your vehicle in a safe manner. Do not attempt to use the scanner or read data while driving.
• Ensure the vehicle is parked on a level surface with the parking brake engaged before connecting or disconnecting the device.
• Do not expose the device to extreme temperatures, moisture, or corrosive substances.
• Keep the device out of reach of children.
• Consult a qualified mechanic if you are unsure about any diagnostic results or vehicle repairs.

3. Product Features

The ELM327 V1.5 (Wireless BT5.0) offers a range of features for comprehensive vehicle diagnostics:

• Small size and compact structure for easy plug-and-play operation.
• Stable wireless connection via Bluetooth-Compatible 5.0.
• No external wires or batteries required; powered by the vehicle's 12V battery.
• Automatic sleep mode after 30 minutes of no communication, with ultra-low power consumption (less than 10mA).
• Supports all OBDII protocols for widest vehicle coverage.
• Equipped with a fast communication mode and reliable PIC18F25K80 chip, supporting up to 30 PIDs/second.
• True ON-OFF button for manual power control.

4. Setup and Connection

4.1 Vehicle Compatibility

This ELM327 adapter is designed to work with all OBD-II Compliant vehicles. Please refer to the following guidelines:

• United States: 1996 or newer model year vehicles (e.g., Chrysler, Ford, GM, Jeep).
• European Union: 2004 or newer model year vehicles (e.g., Alfa Romeo, SAAB, Acura, Opel, Audi, Seat, Peugeot, Renault after 2009, Bentley, Skoda, Daewoo, Benz, Daihatsu, Land Rover, BMW, Vauxhall, Citroen, Volvo, Fiat, VW, Ford, Jaguar). Note: Does not support Renault Clio 2.
• Asian Car Makes: 2008 or newer model year vehicles (e.g., KIA, Isuzu, Honda, Mitsubishi, Hyundai, Dacia, Lexus, Mazda, Nissan, Subaru, Suzuki, Toyota).

Important Notes for Special Car Models:

• For Lada/VAZ/UAZ: Do not purchase if your car is before 2006.
• For Ssangyong: Do not purchase if your car is before 2008.
• For Renault - Dacia - Logan: Do not purchase if your car is before 2009.

Even though it is compatible with most cars, but different regions support the vehicle OBD2 protocol at different times, or some car is spercial design, so it may not compatible with some cars which do not support OBD2 protocol. If you are unsure, please consult your vehicle's manual or contact the seller.

4.2 Connecting to Your Vehicle

1. Start your car's engine.
2. Locate your vehicle's 16-pin OBD-II diagnostic port. This port is usually located under the dashboard on the driver's side.
3. Connect the KONNWEI ELM327 scanner to the OBD-II port. Ensure it is securely plugged in.

4.3 Bluetooth Pairing (BLE5.0 Dual Mode Version)

The KW902 supports both Android and iOS devices. Follow the steps below for your specific operating system:

For Android Users:

1. From your phone's Home screen, go to the Settings page.
2. Navigate to Bluetooth settings and turn it on.
3. Search for available devices and select V-LINK (or KONNWEI). The default password is "1234".
4. Once the device is paired, open your preferred OBD-II application (e.g., Torque app).
5. In the app's settings, go to OBD II adapter settings.
6. Choose connection type: Bluetooth.
7. Choose Bluetooth device: V-LINK (or KONNWEI).
8. Exit the Torque app completely and then re-run it. The device should now be connected.

For iOS Users:

1. From your phone's Home screen, go to the Settings page.
2. Click on the Bluetooth function and ensure it is turned on. (Note: The device name may be invisible in the iOS Bluetooth device list).
3. Open your preferred OBD-II application (e.g., Accurate app).
4. Go to the app's Settings page.
5. Select Bluetooth and connect to the device from within the app.
6. Exit the Accurate app completely and then re-run it. The device should now be connected.

5. Operation

Once connected, you can use your chosen OBD-II application to perform various diagnostic tasks. The device allows you to:

• Read Diagnostic Trouble Codes (DTCs): Retrieve both generic and manufacturer-specific codes.
• Clear Trouble Codes: Turn off the Malfunction Indicator Lamp (MIL), also known as the "Check Engine" light.
• Display Current Sensor Data: Monitor real-time operating performance of your car, 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
  • Fuel Pressure
• Measure Fuel Consumption.
• Download Data: Save diagnostic data to external media in various formats for later analysis or printing.
• Record Parameters: Record various parameters and display real-time graphics.

6. Maintenance

• Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Power Management: The device features an auto-sleep mode, activating after 30 minutes of inactivity to conserve power. The blue ON/OFF button can be used to manually reset or wake up the device. Due to its ultra-low sleep mode consumption (less than 10mA), it is generally safe to leave it plugged into your car overnight.

7. Troubleshooting & FAQ

Q1: What is the version of the ELM327?

A1: This is the real V1.5 High Quality version, featuring the original Microchip PIC18F25K80. It operates at a frequency of 4MHz (crystal oscillator) and supports ATAL and ATPPS commands, as well as all OBD2 vehicles.

Q2: What is the difference between V1.5 and V2.1? How can I check it?

A2: Our ELM327 is 100% V1.5, which supports a full set of 10 protocols, including J1850 & J1939 Protocols crucial for Japanese and American cars. Other ELM327 versions (often V2.1) may only support 7 or 9 protocols. You can often check the version within your diagnostic application (e.g., ELM327 Identifier app).

Q3: Does this adapter support diesel cars or trucks? Is it working with iOS?

A3: Yes, the ELM327 protocol generally supports diesel vehicles. This specific KW902 model features Bluetooth-Compatible 5.0 and is designed to work with both Android and iOS devices. Ensure your diagnostic application is compatible with Bluetooth 5.0 Low Energy (BLE) for optimal performance with iOS.

Q4: What functions can I perform with the ELM327?

A4: The device allows you to read, erase, and display diagnostic trouble codes (both standard and manufacturer-specific), measure fuel consumption, display real-time operating performance (e.g., engine RPM, vehicle speed, temperatures, pressures), turn off the "Check Engine" light, download data, and record various parameters for real-time graphical display.

Q5: What is the function of the ON/OFF button?

A5: The blue ON/OFF button is used to reset or wake up the device. This new design incorporates an auto-sleep mode, which activates after 30 minutes of no communication. The sleep mode consumes very little power (only 10mA), so you don't need to worry about draining your car battery if you leave it plugged in overnight.

8. Specifications

9. User Tips

• App Selection: For Android, popular apps like "Torque" are widely used. For iOS, look for apps specifically designed for ELM327 Bluetooth LE (Low Energy) devices, as standard Bluetooth pairing might not show the device name.
• Compatibility Check: Always double-check your vehicle's compatibility with OBD-II standards and the specific year ranges mentioned in Section 4.1 before use.
• Firmware Version: If your diagnostic app shows a different ELM327 version (e.g., V2.1), it might be a clone. The KW902 is advertised as a true V1.5.
• Power Saving: Take advantage of the auto-sleep feature. The ON/OFF button is there if you need to manually cycle power or wake the device.

10. Warranty and Support

For specific warranty details, please refer to the documentation provided with your purchase or contact the seller directly. This product includes an English User Manual in the package for additional guidance.