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1. INTRODUCTION
The CReader VI is a game changer in the world of portable Automotive Diagnostics. Is it a code scanner, or is it a scan
tool? The CReader VI blurs the lines by being the first full color, 4 PID graphing code scanner in the market. The CReader
VI boasts an industry leading 2 frames per second data capture, while having the ability to store, record and playback
over 29 data files, lasting over 8 hours! The CReader VI is also very easy to use. With built-in help menus and code
definitions, diagnosing and repairing that dreaded Check Engine Light is now easier than ever! And we don’t top there.
The CReader VI also features the following bi-directional “pecial tests? EVAP, 02 Sensor, I/M Readiness, MIL Status, VIN
Info, and On-board
monitors testing.
NOTICE: AUTO SCANNER MAY AUTOMATICALLY RESET WHILE BEING DISTURBED BY STRONG STATIC ELECTRICITY.
THIS IS A NORMAL REACTION.
2. General Information-About OBDII/EOBD
2.1 On-Board Diagnostics (OBD) II
The first generation of On-Board Diagnostics (called OBD I) was developed by the California Air Resources Board (ARB)
and implemented in 1988 to monitor some of the emission control components on vehicles. As technology evolved and
the desire to improve the On-Board Diagnostic system increased, a new generation of On-Board Diagnostic system
was developed. This second generation of On-Board Diagnostic regulations is called "OBD II".
The OBD II system is designed to monitor emission control systems and key engine components by performing either
continuous or periodic tests of specific components and vehicle conditions. When a problem is detected, the OBD II
system turns on a warning lamp (MIL) on the vehicle instrument panel to alert the driver typically by the phrase of “heck
Engine
Engine Soondetected malfunction so that a technician can accurately find and fix the problem. Here below follow three
pieces of such valuable information:
1) Whether the Malfunction Indicator Light (MIL) is commanded 'on' or 'off';
2) Which, if any, Diagnostic Trouble Codes (DTCs) are stored;
3) Readiness Monitor status.
2.2 Diagnostic Trouble Codes (DTCs)
OBD II Diagnostic Trouble Codes are codes that are stored by the on-board computer diagnostic system in response to a
problem found in the vehicle. These codes identify a particular problem area and are intended to provide you with a guide
as to where a fault might be occurring within a vehicle. OBD II Diagnostic Trouble Codes consist of a five-digit
alphanumeric code. The first character, a letter, identifies which control system sets the code. The second character, a
number, 0-3; other three characters, a hex character, 0-9 or A-F provide additional information on where the DTC
originated and the operating conditions that caused it to set. Here below is an example to illustrate the structure of the
digits: