Obd Ii Definitions - Launch CReader V User Manual

LAUNCH CreaderV User's Manual
drive cycle that enables a monitor and sets readiness codes to "Ready"
varies for each individual monitor. Once a monitor is set as "Ready" or
"Complete", it will remain in this state. A number of factors, including
erasing of diagnostic trouble codes (DTCs) with a code reader or a
disconnected battery, can result in Readiness Monitors being set to "Not
Ready". Since the three continuous monitors are constantly evaluating,
they will be reported as "Ready" all of the time. If testing of a particular
supported non-continuous monitor has not been completed, the monitor
status will be reported as "Not Complete" or "Not Ready."
In order for the OBD monitor system to become ready, the vehicle should
be driven under a variety of normal operating conditions. These
operating conditions may include a mix of highway driving and stop and
go, city type driving, and at least one overnight-off period. For specific
information on getting your vehicle's OBD monitor system ready, please
consult your vehicle owner's manual.

2.6 OBD II Definitions

Powertrain Control Module (PCM) -- OBD II terminology for the
on-board computer that controls engine and drive train.
Malfunction Indicator Light (MIL) -- Malfunction Indicator Light (Service
Engine Soon, Check Engine) is a term used for the light on the
instrument panel. It is to alert the driver and/or the repair technician that
there is a problem with one or more of vehicle's systems and may cause
emissions to exceed federal standards. If the MIL illuminates with a
steady light, it indicates that a problem has been detected and the
vehicle should be serviced as soon as possible. Under certain conditions,
the dashboard light will blink or flash. This indicates a severe problem
and flashing is intended to discourage vehicle operation. The vehicle
onboard diagnostic system cannot turn the MIL off until the necessary
repairs are completed or the condition no longer exists.
DTC -- Diagnostic Trouble Codes (DTC) that identifies which section of
the emission control system has malfunctioned.
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