KONNWEI KW905 ELM327 V1.5 OBD2 Scanner User Manual

1. Introduction

The KONNWEI KW905 ELM327 V1.5 is a universal car mini OBD2 scanner designed for diagnosing engine systems in 12V gasoline and diesel vehicles, as well as hybrid electric vehicles. This device utilizes Bluetooth 5.0 technology to connect with Android and iOS smartphones, allowing users to quickly read car engine emissions data and perform drive cycle verification.

The KW905 BT5.0 is compact, measuring approximately 5x4x2.5 cm, and features a built-in ON/OFF switch to prevent the need for constant disconnection from the OBDII port. It supports high-speed communication and a low-power sleep mode, making it an efficient tool for vehicle diagnostics.

2. Package Contents

Upon opening your KONNWEI KW905 package, you should find the following items:

• KONNWEI KW905 ELM327 V1.5 OBD2 Scanner Unit
• User Manual
• Protective Packaging Box

3. Specifications

4. Setup Guide

Follow these steps to set up your KONNWEI KW905 OBD2 scanner:

1. Locate the OBDII Port: Find the 16-pin OBDII diagnostic port in your vehicle. This is typically located under the dashboard on the driver's side.
2. Plug in the Device: Firmly plug the KW905 scanner into your vehicle's OBDII port. Ensure the device's ON/OFF switch is in the 'ON' position.
3. Download the App: Download a compatible OBD2 scanner application on your Android or iOS smartphone. Popular choices include 'Car Scanner' or similar apps available on the App Store or Google Play.
4. Turn on Ignition: Turn your car's ignition to the 'ON' position (do not start the engine yet).
5. Connect via Bluetooth:
   • Open the downloaded OBD2 app on your phone.
   • Go to the app's settings (usually represented by a gear icon).
   • Select 'Connection' or 'Bluetooth settings'.
   • For iOS devices, select connection type "Bluetooth LE (5.0)" and then select device name "KONNWEI". If Bluetooth 4.0 is shown, you can select that as well.
   • For Android devices, select connection type "Bluetooth" and then select device name "KONNWEI".
6. Establish Connection: After selecting the device, return to the app's main screen and click the "Connect" button. The device will start scanning your car, and after successful initialization, the status will change to "Connected".

5. Operating Instructions

Once connected, you can utilize the various diagnostic functions offered by the KONNWEI KW905 through your chosen OBD2 application:

5.1 Key Functions

• Read Codes: Retrieve Diagnostic Trouble Codes (DTCs) from the vehicle's ECU.
• Erase Codes: Clear DTCs and turn off the Check Engine Light (MIL).
• Live Data: View real-time sensor data from the vehicle.
• Freeze Frame: Capture a snapshot of sensor data when a DTC is set.
• I/M Readiness: Check the status of emission-related diagnostic monitors.
• O2 Sensor Test: Retrieve O2 sensor monitor test results.
• On-Board Monitor Test: Retrieve results for emission-related powertrain components and systems.
• EVAP System Test: Initiate a test of the Evaporative Emission Control System.
• Vehicle Information: Retrieve vehicle identification number (VIN), calibration ID, and calibration verification number (CVN).

5.2 Reading Parameters

With appropriate software, you can read various parameters from your vehicle, including but not limited to:

• Vehicle Speed
• RPM (Revolutions Per Minute)
• Fuel Consumption
• Engine Coolant Temperature
• Fuel Pressure
• Calculated Engine Load
• Throttle Position
• Intake Manifold Pressure
• Air Intake Temperature
• Timing Advance
• Mass Air Flow
• Fuel Level
• Barometric Pressure
• EVAP System Vapor Pressure
• Fuel Trim

5.3 Turning Off Check Engine Light

The KW905 supports fast scanning and clearing of engine errors. If your Check Engine Light is on, you can use the scanner to read the diagnostic trouble codes, identify the issue, and then clear the codes to turn off the light. This can help save time and money by providing immediate insight into your vehicle's condition.

6. Maintenance

• Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
• Storage: Store the scanner in a cool, dry place away from direct sunlight and extreme temperatures. When not in use for extended periods, it is recommended to disconnect it from the OBDII port and store it in its original packaging.
• Avoid Moisture: Keep the device away from water and other liquids to prevent damage to electronic components.
• Handle with Care: Avoid dropping or subjecting the device to strong impacts.

7. Troubleshooting

• Device Not Powering On: Ensure the KW905 is firmly plugged into the vehicle's OBDII port and the ignition is turned to the 'ON' position. Check the device's ON/OFF switch.
• Cannot Connect via Bluetooth:
  • Verify Bluetooth is enabled on your smartphone.
  • Ensure you have selected the correct connection type (Bluetooth LE 5.0 or Bluetooth 4.0) and device name ('KONNWEI') in your OBD2 app settings.
  • Try restarting both the app and your phone's Bluetooth.
  • Ensure no other devices are actively connected to the KW905 via Bluetooth.
• App Not Displaying Data: Ensure the connection status in the app shows 'Connected'. If connected but no data, try restarting the vehicle's ignition cycle and reconnecting. Verify your vehicle is OBD2 compliant.
• Check Engine Light Not Clearing: Some persistent issues may require professional mechanical attention. Clearing codes only resets the light; if the underlying problem is not fixed, the light will reappear.

8. User Tips

• For best performance, ensure your chosen OBD2 app is up-to-date.
• Always turn off the vehicle's ignition before plugging or unplugging the KW905 scanner.
• If experiencing connection issues, try pairing the device directly through your phone's Bluetooth settings before opening the app.

9. Warranty and Support

For warranty information and technical support, please refer to the official KONNWEI website or contact the seller directly. Keep your purchase receipt as proof of purchase for any warranty claims.