1. Introduction
The KONNWEI KW870, KW880, and KW890 series are versatile automotive diagnostic tools designed for both professional mechanics and DIY enthusiasts. These devices combine OBD2 diagnostic capabilities with advanced battery testing functions, offering comprehensive insights into your vehicle's health. Depending on the model, additional features like battery matching or oil service light reset are also available.
This manual provides detailed instructions on how to set up, operate, and maintain your KONNWEI diagnostic tool to ensure accurate and efficient vehicle analysis.
Video 1: KONNWEI KW890 Product Overview
2. Models and Key Functions
The KONNWEI series offers three distinct models, each with a core set of features and specialized functionalities:
- KONNWEI KW870 (2-in-1 Scanner): Supports comprehensive OBD2 diagnostics and battery testing. This model is also compatible with 6V motorcycles.
- KONNWEI KW880 (3-in-1 Scanner): Includes OBD2 diagnostics, battery testing, and a battery matching function.
- KONNWEI KW890 (3-in-1 Scanner): Features OBD2 diagnostics, battery testing, and an oil service light reset function.
Image 1: KONNWEI KW890 highlighting its full functions including Diagnose, Read Codes, Oil Reset, Vehicle Information, Data Stream, and Car Battery Tester.
3. Package Contents
Please check the contents of your package upon receipt. The specific items may vary slightly depending on the model purchased:
KW870 Package
Image 2: Contents for KW870, including the device, battery clip clamp, 16 Pin OBDII cable, upgrade data cable, user manual, packing box, and polyester bag.
- KONNWEI KW870 OBD II Scanner & Battery Tester
- User Manual
- Retail Box
- Nylon Bag
- Mini USB Cable (for update and printing data)
- Battery Clamp Clip Cable (for battery tester function)
- 16 Pin OBD Cable (for OBDII scanner function)
KW880 Package
Image 3: Contents for KW880, including the device, USB cable, OBD cable, battery clip adapter, user manual, packing box, and polyester bag.
- KONNWEI KW880 Battery Test & OBD II Scanner
- User Manual
- Retail Box
- Nylon Bag
- Mini USB Cable (for update and printing data)
- OBD2 Cable to 16pin OBD2 port
- OBD port to battery clip adapter
KW890 Package
Image 4: Contents for KW890, including the device, USB cable, OBD cable, battery clip clamp, user manual, packing box, and polyester bag.
- KONNWEI KW890 OBD2 & Battery Tester & Oil Reset
- User Manual (in English)
- Polyester Bag
- Battery Clamp Clip Cable
- 16 PIN OBD2 Cable
- USB Cable (for update and print)
4. Setup and Initial Use
- Connect to Vehicle: Locate your vehicle's 16-pin OBD2 Data Link Connector (DLC), usually found under the dashboard on the driver's side. Plug the diagnostic tool's OBD2 cable firmly into the DLC.
- Power On: The device will automatically power on once connected to the vehicle's OBD2 port. If using the battery tester function independently, connect the battery clamp clips to the vehicle battery terminals (red to positive, black to negative).
- Language Selection: Upon first use or after a reset, you may be prompted to select your preferred language. Use the navigation buttons (usually up/down arrows) to select and the OK button to confirm.
- System Self-Test: The device will perform a quick self-test. Once complete, the main menu will be displayed.
5. Operating the OBD2 Diagnostic Functions
The KONNWEI scanners support all 10 modes of OBDII test, allowing for comprehensive engine system diagnostics.
Image 5: KW890 illustrating support for all 10 OBDII test modes, including MIL Fault indicator light, On-board monitor Test, EVAP System Test, View Freeze Frame, O2 Sensor Test, I/M Readiness, Vehicle info, Read Codes, Erase Codes, and Live Data.
5.1. Read Codes
This function allows you to retrieve Diagnostic Trouble Codes (DTCs) from the vehicle's control modules, helping to identify the cause of a problem.
- From the main menu, select "Diagnose" or "Read Codes".
- The scanner will communicate with the vehicle's ECU and display any stored DTCs.
- Each code will have a description to help understand the fault.
Image 6: KW890 displaying a P0010 fault code, demonstrating the 'Read Codes' function to understand car faults.
5.2. Erase Codes
This function clears DTCs from the vehicle's memory and turns off the Check Engine Light (MIL). Note that clearing codes only temporarily restores the car to normal; underlying mechanical issues must be repaired.
- After reading codes, select "Erase Codes" from the diagnostic menu.
- Confirm the action when prompted.
- The Check Engine Light should turn off.
Image 7: KW890 demonstrating the 'Erase Codes' function to clear fault lights.
5.3. I/M Readiness
The I/M Readiness function performs a smoke check and other tests to ensure your car complies with state emissions programs before inspection.
- Select "I/M Readiness" from the diagnostic menu.
- The device will display the status of various emission-related monitors (e.g., MIL, DTC, EVAP, O2S).
- A green checkmark indicates completion, while a red 'X' indicates an incomplete test.
Image 8: KW890 showing the I/M Readiness screen, used for vehicle exhaust testing and emissions compliance.
5.4. Data Stream
View real-time vehicle data to understand the car's operational health. You can also perform ripple analysis to observe changes in data streams.
- Select "Data Stream" from the diagnostic menu.
- Choose specific parameters to monitor (e.g., engine RPM, vehicle speed, sensor readings).
- Data can be displayed graphically or numerically.
Image 9: KW890 displaying a graphical data stream, allowing users to view real-time vehicle data for health and ripple analysis.
5.5. Other Diagnostic Functions
- Freeze Frame: Captures a snapshot of sensor data when a fault code is triggered.
- O2 Sensor Test: Monitors and tests the functionality of oxygen sensors.
- On-Board Monitoring: Tests components and systems that are not continuously monitored.
- EVAP System Test: Checks for leaks in the Evaporative Emission Control System.
- Vehicle Information: Retrieves vehicle identification number (VIN), calibration ID, and calibration verification number (CVN).
- DTC Lookup: Provides detailed definitions for diagnostic trouble codes.
6. Operating the Battery Tester Functions
The KONNWEI battery testers can analyze all automotive cranking lead-acid batteries, including Regular Flooded, AGM Flat Plate, AGM Spiral, GEL, and Lithium batteries. It uses advanced conductance testing technology for quick and accurate measurements of battery health, cold cranking amps (CCA), and common faults in the starting and charging systems.
Image 10: KW890 showing the 'Car BAT' menu for checking battery health.
6.1. Battery Test
This function assesses the overall health of your battery.
- From the main menu, select "Car BAT" or "Battery Test".
- Select the battery type (e.g., Regular Flooded, AGM, GEL, Lithium).
- Input the battery's CCA rating (usually found on the battery label).
- The device will perform the test and display results such as State of Health (SOH), State of Charge (SOC), and internal resistance.
Image 11: KW890 displaying battery test results, indicating 'Good Battery', 'Good, Recharge & Charge, Retest', or 'Replace & Bad cell, Replace'.
6.2. Cranking Test
Analyzes the actual cranking voltage and time to evaluate the starting system's condition.
- Select "Cranking Test" from the battery test menu.
- Follow the on-screen prompts to start the engine.
- The device will measure and display cranking voltage and time, indicating if the cranking system is normal or has issues.
Image 12: KW890 performing a Cranking Test, analyzing cranking voltage and time to assess the starting system.
6.3. Charging Test
Evaluates the vehicle's charging system, including the alternator and voltage regulator.
- Select "Charging Test" from the battery test menu.
- Follow the on-screen prompts to run the engine at specified RPMs.
- The device will display charging voltage and ripple, indicating the charging system's performance.
Image 13: KW870 demonstrating multi-function battery tests, including Battery Test, Charging Test, and Cranking Test.
7. Operating the Oil Service Light Reset (KW890 Only)
The KW890 model includes an Oil Service Light Reset function, which allows you to reset the service lamps on the instrument cluster after an oil change or service. This function is crucial for maintaining accurate service intervals and alerts.
Image 14: KW890 showing the Oil Service Reset function, used to reset service lamps on the instrument cluster.
7.1. Performing an Oil Reset
- From the main menu, select "Oil Reset".
- The device will prompt you to select your vehicle's make.
- Follow the on-screen instructions, which may involve turning the ignition on/off or pressing specific buttons on the vehicle.
- Confirm the reset when prompted.
Tip: The oil service reset function is determined by the actual condition of the vehicle and may vary by manufacturer. Refer to your vehicle's service manual for specific procedures.
Image 15: KW890 displaying a list of car brands supported for the 'Car Oil Service Light Reset Function'.
8. Maintenance
8.1. Software Update
KONNWEI provides free software updates to ensure your device is compatible with the latest vehicle models and diagnostic protocols. You can update the software by connecting the device to a computer via the provided USB cable.
- Download the update tool from the official KONNWEI website.
- Install the update tool on your computer.
- Connect the diagnostic tool to your computer using the USB cable.
- Follow the instructions in the update tool to download and install the latest firmware.
Image 16: KW890 illustrating the process of software update via a computer and printing diagnostic reports.
8.2. Cleaning
To maintain the device's performance and longevity, clean it regularly with a soft, damp cloth. Avoid using abrasive cleaners or solvents that could damage the screen or casing.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Loose connection, vehicle battery low, faulty cable. | Ensure OBD2 cable is securely connected. Check vehicle battery voltage. Try a different OBD2 port if available. |
| Communication error with vehicle. | Incorrect protocol, faulty vehicle ECU, non-OBD2 compliant vehicle. | Verify vehicle is OBD2 compliant (1996 and newer for most regions). Check for firmware updates. Ensure ignition is on. |
| Cannot clear fault codes. | Underlying fault still present, ignition off. | Ensure the underlying issue causing the code has been repaired. Turn ignition to ON position (engine off). |
| Battery test results are inconsistent. | Loose battery clamp connection, incorrect battery type/CCA input. | Ensure battery clamps are clean and securely attached. Double-check battery type and CCA values entered. |
10. Specifications
- Brand: KONNWEI
- Origin: Mainland China
- Certifications: CE, FCC, RoHS
- Supported Vehicles (OBD2): All 1996 and newer 12V gasoline and diesel vehicles that are OBD II compliant.
- Supported Batteries (Battery Tester): All automotive cranking lead-acid batteries, including Regular Flooded, AGM Flat Plate, AGM Spiral, GEL, and Lithium batteries. (KW870 also supports 6V motorcycles).
- KW870 Functions: Diagnosis + Battery Test
- KW880 Functions: Diagnosis + Battery Test + Battery Match
- KW890 Functions: Diagnosis + Battery Test + Oil Reset
- Supported Languages (KW870): English, French, German, Spanish, Russian, Polish, Italian, Portuguese, Dutch
- Supported Languages (KW880/KW890): English, French, German, Spanish, Russian, Polish, Italian
- Package Dimensions: Length: 27 cm, Width: 20 cm, Height: 8 cm
- Package Weight: 0.94 kg
Image 17: KW890 demonstrating its capability to check 12V battery voltage with a waveform display.
11. User Tips
- Always ensure your vehicle's ignition is in the 'ON' position (engine off) when performing diagnostic scans, unless specifically instructed otherwise by the device for certain tests (e.g., Cranking Test).
- For accurate battery test results, ensure the battery terminals are clean and the clamps are securely attached.
- Regularly check the KONNWEI official website for software updates to ensure your device has the latest vehicle compatibility and features.
- If you encounter a persistent fault code after clearing it, it indicates an underlying issue that requires further investigation and repair.
- Keep the device and its cables stored in the provided polyester bag to protect them from dust and damage.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided in your product packaging or visit the official KONNWEI website. Keep your purchase receipt as proof of purchase for warranty claims.
