Creator
OBDII/EOBD scanner
5
2.
General Information
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
Diagnostics system increased. A new generation
of On-Broad Diagnostic system was developed.
This second generation of On-Broad 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 “Check
Engine” or “Service Engine Soon”. The system
will also store important information about the
detected 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’;
