KONNWEI KW850 Enhanced OBD2/EOBD Car Diagnostic Scanner User Manual

1. Introduction

The KONNWEI KW850 is an enhanced On-Board Diagnostics (OBD) II/EOBD scanner designed to assist in diagnosing vehicle issues. It provides comprehensive diagnostic functions, including reading and clearing Diagnostic Trouble Codes (DTCs), viewing live data, and performing various system tests. This manual provides instructions for the proper use and maintenance of your KW850 scanner.

2. Package Contents

Upon opening your KONNWEI KW850 package, please verify that all the following items are included:

KONNWEI KW850 OBDII Scanner Unit
OBDII Connection Cable
USB Cable for Updates and Data Transfer
Protective Carrying Case
Software CD
User Manual (this document)

KONNWEI KW850 package contents including the scanner, cables, and carrying case.

Image: The KONNWEI KW850 diagnostic scanner, its OBDII cable, USB cable, carrying case, and user manual are shown together, illustrating the complete package contents.

3. Product Features

The KONNWEI KW850 offers a range of features designed for comprehensive vehicle diagnostics:

All-in-One Scan Tool: Reads and clears Diagnostic Trouble Codes (DTCs), turns off the Malfunction Indicator Lamp (MIL), and provides quick access to I/M Readiness status.
Extensive Vehicle Coverage: Compatible with most US-manufactured vehicles from 1996 onwards, and Asian/European vehicles from 2001 onwards that support OBDII/EOBD protocols.
Live Data Monitoring: Reads, records, graphs, and replays live sensor data, including O2 sensor test results and PCM data streams.
Advanced Diagnostic Tests: Supports on-board monitoring test results and EVAP system test results.
High-Resolution Color Display: Features a 2.8-inch TFT 320x240 PDI LCD screen with high brightness and contrast for clear readability.
User-Friendly Interface: Intuitive menu navigation and shortcut keys for ease of use.
Software Updates & Printing: Allows for convenient software updates via USB and printing of diagnostic codes to a PC.
Real-time Battery Monitoring: Monitors vehicle battery voltage during scanning to prevent unexpected power loss.
Multilingual Support: Supports multiple languages including English, Spanish, French, and Dutch.

4. Setup

Follow these steps to set up your KONNWEI KW850 scanner:

Locate the OBDII Port: The OBDII port is typically located under the dashboard on the driver's side of the vehicle. Refer to your vehicle's owner's manual if you cannot find it.
Connect the Scanner: Plug the OBDII connection cable from the KW850 scanner into your vehicle's OBDII port. Ensure a secure connection.
Power On the Vehicle: Turn the vehicle's ignition to the 'ON' position without starting the engine. For some vehicles, starting the engine may be required for full functionality.
Scanner Initialization: The KW850 scanner will automatically power on and initialize. The main menu will appear on the screen.
Language Setting: If necessary, navigate to 'Tool Setup' from the main menu to select your preferred language.

KONNWEI KW850 scanner connected to a vehicle's OBDII port.

Image: The KONNWEI KW850 diagnostic scanner is shown connected to the OBDII port located under the dashboard of a vehicle, demonstrating a typical setup scenario.

5. Operating Instructions

The KW850 features a user-friendly interface with a main menu and navigation buttons. The primary buttons are ESC (Exit/Cancel), I/M (I/M Readiness shortcut), OK (Confirm/Enter), and directional arrow keys (Up, Down, Left, Right).

KONNWEI KW850 scanner displaying its main menu on the color screen.

Image: The KONNWEI KW850 scanner is displayed, showing its main menu on the color screen with options like Diagnostic, DTC Lookup, Review, Tool Setup, Print Data, Help, and BAT Check.

5.1 Main Menu Functions

Diagnostic: Accesses the primary diagnostic functions, including reading and clearing codes, live data, freeze frame, and various monitor tests.
DTC Lookup: Allows you to manually enter a DTC to view its definition.
Review: Views previously saved diagnostic data.
Tool Setup: Configures scanner settings such as language, unit of measure, and display options.
Print Data: Prepares diagnostic data for printing via a connected PC.
Help: Provides general information and guidance on using the scanner.
BAT Check: Monitors the vehicle's battery voltage in real-time.

5.2 OBDII Modes Explained

The OBDII system uses various

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