KONNWEI KW680 – OBD2/EOBD/CAN Diagnostic Scanner with DTC Lookup, Live Data & O2 Sensor Test

Introduction

The KW680 is designed to quickly identify why the Check Engine light is on and to provide an overview of the engine's emission-related systems. With DTC reading/clearing, I/M readiness, live data, and O2 test, you can troubleshoot effectively and confirm repairs after servicing. The tool supports multiple languages (e.g., English, Spanish, Portuguese, French, Russian, German, Dutch, Italian) and has a built-in DTC database for quick fault code interpretation.

The KW680 is ideal for hobbyists, workshops, and car dealerships who need a standalone, reliable tool for OBD2/EOBD/CAN. You connect via the 16-pin OBD port – no separate app is required. For wireless adapters and mobile apps, see Vgate/vLinker.

Specifications

• Product Type: Digital handheld engine analyzer / code reader
• Model: KONNWEI KW680
• Power: 12 V via vehicle's OBD2 socket
• Display: 2.4" TFT color display, built-in speaker
• Connection: 16-pin OBD2 (DLC)
• Material: ABS
• Certificates: CE, FCC, RoHS
• Device Languages: English, Spanish, Portuguese, French, Russian, German, Dutch, Italian
• Functions: Read/clear fault codes, live data, freeze frame, I/M readiness, O2 monitor test, on-board monitor test, component test (triggers ECU test), vehicle info (VIN/CALID/CVN), battery test (BAT check), modules present, DTC lookup, review & print data
• Compatible Drivetrain: 12 V petrol/diesel/hybrid with OBD2/EOBD

Features & Applications

• Read Codes: Identify which parts of the emissions system are causing faults (P0xxx/P1xxx etc.).
• Erase Codes: Clear fault codes after repair (ignition ON, engine OFF). Note that monitors will be reset.
• Live Data: Display real-time values – e.g., RPM, ECT, IAT, MAP/MAF, STFT/LTFT, O2, ignition, speed.
• Freeze Frame: Snapshot of sensor data at the moment the fault occurred – crucial for troubleshooting.
• I/M Readiness: Overview of emissions monitor status before inspection.
• O2 Monitor Test: Display the ECU's last O2 sensor test (not live values) – not supported on all cars.
• On-Board Monitor Test (Mode $06): Reading of specific monitoring tests (component/system tests).
• Component Test (Mode $08): Initiate certain test commands via ECU where the vehicle supports it.
• Vehicle Info (Mode $09): VIN/CALID/CVN where available.
• BAT Check: General battery status via OBD – useful for starting/charging related troubleshooting.
• Modules Present: Protocol/communication overview.
• DTC Lookup: Built-in fault code database for quick interpretation.
• Review/Print: Play back saved data and print via PC.

Note: Functions always depend on what the vehicle's ECU exposes via OBD2.

Supported Protocols & Vehicle Compatibility

The KW680 works on vehicles that meet the OBD2/EOBD standard and have a 16-pin OBD2 socket:

• USA: Passenger cars/light trucks from 1996+
• EU: Petrol ≈2001+, Diesel ≈2004+
• Canada: ≈1998+
• China: Standard OBD2 ≈2011+
• Japan/Korea: OBD2 support may vary; some models later – check vehicle-specific information

Supported car brands (examples, OBD2 standard): Chrysler, Ford, GM, Jeep; Alfa Romeo, Saab, Opel/Vauxhall, Audi, SEAT, Peugeot, Bentley, Škoda, Daewoo, Mercedes-Benz, Daihatsu, Land Rover, BMW, Citroën, Volvo, Fiat, VW, Jaguar; Kia, Isuzu, Honda, Mitsubishi, Hyundai, Dacia, Lexus, Mazda, Nissan, Subaru, Suzuki, Toyota, etc.

Limitations & Notes: Russian car brands before 2012 (VAZ, UAZ, LADA) are generally not supported. Does not work on Renault trucks and some SsangYong. Some models/regions have late OBD2 implementation – compatibility may vary.

Manual & Step-by-Step Guide

Preparations

1. Locate the car's OBD2 socket (DLC) – usually under the dashboard on the driver's side.
2. Ensure stable battery voltage (low voltage can cause communication errors).
3. Start the KW680 and select language from the menu if needed.

Quick Troubleshooting

1. Connect the KW680 to the 16-pin OBD2 with the ignition OFF.
2. Turn the ignition ON (engine off). The device automatically identifies the protocol.
3. Select Read Codes → note DTCs and descriptions.
4. Open Freeze Frame to see data when the fault occurred.
5. Check I/M Readiness before inspection.
6. Address the root cause → select Erase Codes to turn off the light and reset monitors.

Live Data & Graphs

1. Open Live Data. Select relevant PIDs (e.g., RPM, ECT, STFT/LTFT, O2, MAP/MAF).
2. Display as numeric or graph. Limit the number of PIDs for faster updates.
3. Save log and use Review/Print for documentation.

O2 & On-Board Tests

• O2 Monitor Test: Displays the ECU's latest test results (not live). Results vary per car.
• On-Board Monitor (Mode $06): Analyze component/monitoring tests and limit values (Pass/Fail).
• Component Test (Mode $08): Initiates selected tests via ECU if the vehicle supports it. Follow vehicle service instructions.

Printing

1. Connect the KW680 to a PC according to the manual.
2. Transfer saved reports/logs and print (format may vary depending on the software).

Difference: KW680 vs. KW850

• Screen & Buttons: The KW850 has a larger screen and more navigation buttons (better browsing/overview).
• Software: Largely the same internal functionality between the models.
• Choice: Choose the KW850 if you want a larger display and more ergonomic navigation. Choose the KW680 for a more compact format and lower price.

Frequently Asked Questions (FAQ)

1. Does the KW680 read ABS/airbag/BCM?

OBD2/EOBD focuses on engine/emissions. For systems like ABS/SRS, brand-specific or system-specific tools are required.

2. Does it work on all cars?

On OBD2/EOBD-compliant 12 V vehicles with a 16-pin socket (see timelines per region). Some models/regions may lack full exposure.

3. Can I print reports?

Yes, via PC according to the manual. You can also store data and review it later.

4. Does it turn off the check engine light?

Yes – after Erase Codes, provided the fault has been rectified. Otherwise, the light may come on again.

5. The O2 test shows no values?

It displays the ECU's latest test results and is not supported on all cars. For live O2 values, use Live Data.

6. What does I/M readiness mean?

Status of the emissions monitors. After code clearing, monitors must become "Ready" again via a drive cycle before inspection.

7. Support for diesel/hybrid?

Yes, as long as the vehicle complies with OBD2/EOBD and has a 12 V system.

8. Does it work with a 24 V truck?

No, the KW680 is designed for 12 V lighter vehicles. For heavy-duty/24 V, other tools/adapters are required.

Tips & Best Practices

• Save before clearing: Document DTC + freeze frame before erasing – facilitates troubleshooting.
• Choose the right PIDs: 6–10 key values provide faster graphs and clearer analysis.
• After clearing: Perform a drive cycle to get I/M monitors "Ready" before inspection.
• Voltage quality: Low voltage can cause "No Comm" and unstable readings.
• Complement smartly: Do you need wireless diagnostics on your mobile? See Vgate/vLinker. Want to compare more standalone units? See handheld scanners.

Package Contents

• 1 × KONNWEI KW680 Code Reader
• 1 × OBD2 cable (integrated/included as per package)
• 1 × User Manual

Important Notices & Disclaimer

• OBD2/EOBD primarily covers engine & emissions. Other systems may require brand-specific tools.
• Vehicles and model years vary in the data they expose. Not all functions are available on all cars.
• All diagnostics are performed at your own risk. Use the tool in a safe place and follow local regulations.
• Region/manufacturer variations may affect compatibility (especially older Japanese/Korean models).

Summary

The KONNWEI KW680 is an affordable and comprehensive handheld code reader for OBD2/EOBD/CAN. With DTC lookup, live data, freeze frame, I/M, O2, and on-board tests, as well as printing support, it is a reliable tool for troubleshooting, verification, and documentation – whether you are an enthusiast or work in a workshop. 🔧