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9
system has completed testing on each component. Components
that have been tested will be reported as “Ready” or “Complete”,
meaning they have been tested by the OBD II system. The
purpose of recording readiness states is to allow users to
determine if vehicle’s OBD II system has tested all the
components and systems.
The Power Train Control Module (PCM) sets a monitor to
“Ready” or “Complete”, it will remain in this state. A number of
factors, including erasing of diagnostic trouble codes (DTCs)
with a scan tool or a disconnected battery, can result in Readiness
Monitors being set to “Not Ready”. Since the 3 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.”
To make OBD monitor system be 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
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