The following monitors are to be used for spark ignition (Gasoling) engines
only:
1) EGR System
2) O2 Sensors
3) Catalyst
4) Evaporative System
5) O2 Sensor Heater
6) Secondary air
7) Heated Catalyst
The following monitors are to be used for compression ignition (Diesel)
engines only:
1
)
EGR System
2
)
NMHC Catalyst
3
)
NOx aftertreatment
4
)
Boost pressure system
5
)
Exhaust gas sensor
6
)
PM filter
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
heen 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 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 scan tool 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 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
。
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