engine system components require the vehicle to be operated under specific
conditions before the monitor is ready. These monitors are termed
non-continuous monitors and are listed below:
1) EGR System
4) Evaporative System
6) Secondary air Injection
7) Heated Catalyst
8) A/C system
2.5 OBD II Monitor Readiness Status
OBD II systems must indicate whether or not the vehicle's PCM's monitor 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 status is to allow inspectors to
determine if the vehicle's OBD II system has tested all the components and/or
The Powertrain Control Module (PCM) sets a monitor to "Ready" or "Complete"
after an appropriate drive cycle has been performed. The 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.
CReader Series English User's Manual