Filter
Top Products
- 29 -
6) I/M Readiness
The I/M Readiness (Inspection / Maintenance) function is used to view
a snapshot of the operations for the emission system on OBD II vehicles.
I/M Readiness is a very useful function. To guarantee no faults exist
make sure all monitors are ok or n/a and no DTC’s exist.
Refer to the vehicles service manual for the drive cycle operation.
During normal driving conditions, the vehicle’s computer scans the
emission system. After a specific amount of drive time (each monitor
has specific driving conditions and time required), the computer’s
monitors decide if the vehicles emission system is working correctly
or not as well as detecting out of range values. When the monitor’s
status is:
• Has Run - vehicle was driven enough to complete the monitor.
• Has Not Run - vehicle was not driven enough to complete the
monitor.
• Don’t support- vehicle does not support that monitor.
Depending on vehicle, disconnecting or a discharged battery may
erase DTCs and clear monitor status.
Monitors may be cleared by:
Erasing codes
Vehicle control modules losing power
I/M Readiness can be done with the KOER or KOEO.
Abbreviations and names for OBD II Monitors supported by the Scan
Tool are shown below. They are required by the United States
Environmental Protection Agency (EPA). Not all monitors are
supported by all vehicles.
• Abbreviated Name • Expanded Name
- MIS Misfire Monitor
- FUE Fuel System Monitor
- CCM Comprehensive Components Monitor
- CAT Catalyst Monitor
- HCA Heated Catalyst Monitor
- EVA Evaporative System Monitor
- AIR Secondary Air System Monitor
- ACR Air Conditioning Refrigerant Monitor
- O2S Oxygen Sensor Monitor
- HTR Oxygen Sensor Heater Monitor
- EGR
x
haust Gas Recirculation System Monito
r