1. Introduction
The KONNWEI KW890 is a versatile 3-in-1 automotive tool designed to assist vehicle owners and technicians with essential car maintenance and diagnostics. It combines the functionalities of an OBD2/EOBD diagnostic scanner, a car battery tester, and an oil service light reset tool into a single, user-friendly device.
This manual provides detailed instructions on how to effectively use each function of your KW890 tool, ensuring accurate diagnostics and proper vehicle maintenance.
2. Package Contents
Please check the package carefully to ensure all items are present and in good condition:
- 1x KONNWEI KW890 Main Unit
- 1x User's Manual (English)
- 1x Polyester Bag for storage
- 1x Battery Clamp Clip Cable
- 1x 16 PIN OBD2 Cable
- 1x USB Cable for Update and Print
3. Specifications
3.1 General Specifications
- Brand Name: KONNWEI
- Origin: Mainland China
- Certification: CE, FCC
- High-concerned chemical: None
3.2 OBD2/EOBD Compatibility
The KW890 is compatible with standard OBD2/EOBD compliant vehicles.
- American (USA) cars: Compatible with Standard OBD2 Cars from 1996 to present (e.g., Chrysler, Ford, GM, Jeep).
- European cars: Compatible with Standard OBD2 Cars from 2003 to present (e.g., Alfa Romeo, SAAB, Acura, Opel, Audi, Seat, Bentley, Skoda, Daewoo, Benz, Daihatsu, Land Rover, BMW, Vauxhall, Volvo, VW, Ford, Jaguar).
- French cars: Compatible with Standard OBD2 Cars from 2003 to present (e.g., Citroen, Fiat, Renault, Peugeot). Note: Not supported for Renault Clio 2/Megane/Dacia Logan.
- Asian cars: Compatible with Standard OBD2 Cars from 2008 to present (e.g., KIA, Isuzu, Honda, Mitsubishi, Hyundai, Dacia, Lexus, Mazda, Nissan, Subaru, Suzuki, Toyota).
- Chinese cars: Compatible with Standard OBD2 Cars from 2009 to present (e.g., BYD, Chery, Geely, Great Wall, Karry).
Important Note on Compatibility:
- Not supported for Russian Cars (VAZ, UAZ, LADA).
- Not compatible with trucks for Ssangyong Actyon (2009-2017) or Ssangyong Korando 2.0 TD Diesel (2013-2017).
- Not supported for Ssangyong cars in general.
- Not supported for Opel Corsa c 2004 1.3 CDTI or VW Golf 4 2002.
- Not supported for Citroen C4/C5.
- Not supported for Chevrolet cars.
- Not supported for Renault Logon/Megane.
- Not supported for Skoda Fabia, Skoda Octavia.
- This device primarily offers OBD2 functions and does not include special functions like ABS Reset or Airbag Reset.
3.3 Battery Test Standards & Types
The KW890 battery tester supports testing of 12V lead-acid batteries, including:
- Ordinary lead-acid battery
- AGM flat plate battery
- AGM spiral battery
- GEL battery
- EFB battery
- Lithium battery
The device covers 9 battery measure standards with the following test ranges:
| Measure Standard | Test Range |
|---|---|
| Cold Cranking Amps (CCA) | 100-2000 CCA |
| Battery Council International (BCI) | 100-2000 CCA |
| Cranking Amps (CA) | 100-2000 CCA |
| Marine Cranking Amps (MCA) | 100-2000 CCA |
| Japanese Industry Standard (JIS) | 26A17-24SH52 |
| Deutsche Industrie-Norm (DIN) | 100-1400 CCA |
| International Electrot-Echnical Commission (IEC) | 100-1400 CCA |
| Europe-Norm (EN) | 100-2000 CCA |
| Society of Automotive Engineers (SAE) | 100-2000 AH |
4. Setup and Initial Use
4.1 Connecting for OBD2 Diagnostics
- Locate your vehicle's 16-pin Data Link Connector (DLC), usually found under the dashboard on the driver's side.
- Ensure the vehicle's ignition is OFF.
- Connect the KW890's 16 PIN OBD2 Cable to the vehicle's DLC port.
- Turn the vehicle's ignition to the ON position (engine can be off or running, depending on the test).
- The KW890 will power on automatically.
4.2 Connecting for Battery Testing
- Ensure the vehicle's ignition is OFF and all accessories are turned off.
- Connect the red battery clamp to the positive (+) terminal of the battery.
- Connect the black battery clamp to the negative (-) terminal of the battery.
- The KW890 will power on automatically.
5. Operating Instructions
Navigate through the menu using the UP/DOWN arrow buttons and confirm selections with the OK button. Use the ESC button to go back to the previous screen.
5.1 OBD2 Diagnostic Functions
From the main menu, select 'Diagnose' to access the OBD2 functions.
- Reading Codes: Displays detailed descriptions of Diagnostic Trouble Codes (DTCs) that have triggered the Check Engine Light.
- Erasing Codes & Reset: Clears DTCs, turns off the Check Engine Light (MIL), and resets monitors.
- Data Stream: Reads and displays live ECU/PCM data, allowing graphical plotting and storage of freeze frame data. This helps in identifying faulty sensor readings.
- I/M Readiness Status: Indicates whether the vehicle's emissions-related systems are operating correctly and are ready for inspection/maintenance testing (smog check).
- View Freeze Frame Data: Shows vehicle conditions recorded by the on-board computer at the moment an emission-related fault occurred.
- Read Vehicle Information: Displays information such as VIN (Vehicle Identification Number), CID (Calibration ID), and CVN (Calibration Verification Number).
- Turn off engine warning light: Clears the Check Engine Light after repairs are made.
- Smoke emission Check: Assists in checking for smoke emissions.
- Engine EPC Check: Performs an Electronic Power Control check.
5.2 Battery Test Functions
From the main menu, select 'Car BAT' to perform battery tests.
The KW890 uses state-of-the-art conductance testing technology to quickly and accurately measure the actual cold cranking amps (CCA) capability of the starting battery, its overall health, and common faults within the vehicle's starting and charging systems.
- Battery Voltage Waveform Analysis: Provides a graphical representation of the battery's voltage over time, helping to identify fluctuations and potential issues.
- Battery Health Status: Displays results such as 'Good Battery', 'Good, Recharge & Charge, Retest', or 'Replace & Bad cell, Replace'.
- Support for Multiple Battery Types: Compatible with various 12V lead-acid battery types as listed in Section 3.3.
5.3 Oil Reset Service
From the main menu, select 'Oil Reset' to perform the oil service light reset function.
This function allows you to reset the Engine Oil Life system, which calculates an optimal oil life change interval based on vehicle driving conditions and climate. This is crucial after an oil change to ensure accurate maintenance reminders.
Note: The oil reset function is a specialized feature and may not be compatible with all car models or years. Please refer to the compatibility list in Section 3.2.
Supported car brands for Oil Reset function include:
- ASTON MARTIN, ACURA, AUDI, BENTLEY, BMW, BUGATTI, BORGWARD, CHRYSLER, JEEP, DODGE, CITROEN, DACIA, DAEWOO, FERRARI, FIAT, ALFA ROMEO, LANCIA, FORD, GM, HOLDEN, HONDA, INFINITI, ISUZU, INDIA CARS, JAGUAR, KIA, LAMBORGHINI, LANDROVER, LEXUS, MASERATI, MAYBACH, MAZDA, MG, MERCEDES-BENZ, MINI, MITSUBISHI, NISSAN, OPEL, PEUGEOT, PORSCHE, PROTON, RENAULT, ROLLS-ROYCE, ROMEO/ALFA ROMEO, ROVER, SAAB, SCION, SEAT, SKODA, SMART, SUBARU, SUZUKI, TOYOTA, VAUXHALL, VOLVO, VW.
5.4 Review and Data Stream Functions
The KW890 includes data storage and memory functions for reviewing past diagnostic information.
- DTC: Review stored Diagnostic Trouble Codes.
- Datastream: View recorded live data streams.
- Freeze Frame: Access saved freeze frame data.
- Waveform: Review recorded waveform data.
- Save Result: Save current diagnostic results for later review.
6. Maintenance and Software Updates
The KONNWEI KW890 offers free lifetime software updates to ensure compatibility with new vehicle models and diagnostic protocols.
6.1 Software Update Procedure
- Step 1: Press and hold any button on the scanner BEFORE connecting it to your PC.
- Step 2: Search online for the official technical support website:
www.itoscanner.com. - Step 3: Download the update software (Uplink tool) and unzip it to your computer desktop.
- Step 4: Open the "Uplink" application to proceed with the upgrade and printing functions.
7. Troubleshooting
7.1 General Issues
- Device not powering on: Ensure the OBD2 cable is securely connected to the vehicle's DLC or the battery clamps are correctly attached to the battery terminals. Check vehicle ignition status for OBD2 connection.
- Communication error: Verify the vehicle is OBD2 compliant and the connection is secure. Some older or non-standard vehicles may not be fully compatible.
- Screen frozen/unresponsive: Disconnect the device from the vehicle/battery, wait a few seconds, and reconnect. If the issue persists, perform a software update.
7.2 Compatibility Warnings
As noted in the specifications, certain vehicle models and brands may not be fully supported for all functions. If you encounter compatibility issues, especially with the Oil Reset function or specific diagnostic features, please:
- Verify your vehicle's make, model, year, engine size, and fuel type against the supported lists.
- Ensure your device software is up to date.
- Contact KONNWEI customer support with your vehicle details for further assistance.
8. User Tips
- Always turn off the ignition before connecting or disconnecting the OBD2 cable or battery clamps to prevent potential damage to the vehicle's ECU or the scanner.
- Keep the user manual handy for quick reference, especially for specific DTC definitions or operational steps.
- Regularly check for software updates to ensure your KW890 has the latest vehicle compatibility and features.
- For battery testing, ensure battery terminals are clean for accurate readings. Corroded terminals can lead to inaccurate results.
- When performing an oil reset, follow the on-screen prompts carefully and ensure the correct vehicle model is selected if prompted.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided on the official KONNWEI website (www.itoscanner.com) or contact your original point of purchase. Keep your purchase receipt as proof of purchase for warranty claims.





