5
3)
Catalyst
4)
Evaporative System
5)
02 Sensor Heater
6)
Secondary air
7)
Heated Catalyst
8)
A/C system
2.5 OBDII Monitor Readiness Status
OBDII 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 systems.
The power train 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 minitor. 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 scan tool , 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
Power train Control Module (PCM) -- O BD 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
