Full Product Manual

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monitors are termed non-continuous monitors. For different ignition type
engines, the available monitors are different too.
The following monitors are to be used for spark ignition 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 engines
only:
1) EGR System
2) NMHC Catalyst
3) NOx Aftertreatment
4) Boost Pressure System
5) Exhaust Gas Sensor
6) PM Filter
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 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