Use and Care Manual

28
Retrieving I/M Readiness Status
I/M Readiness function is used to check the operations of the Emission
System on OBDII compliant vehicles. It is an excellent function to use prior
to having a vehicle inspected for compliance to a state emissions program.
CAUTION: By clearing trouble codes you also clear the readiness status for
the individual emission system readiness tests. In order to reset these
monitors, the vehicle must be driven through a complete drive cycle with no
trouble codes in memory. Times for reset vary depending on vehicle.
Some latest vehicle models may support two types of I/M Readiness tests:
A. Since DTCs Cleared – indicates status of the monitors since the DTCs
are erased.
B. This Drive Cycle – indicates status of monitors since the beginning of
the current drive cycle.
An I/M Readiness Status result of “NO” does not necessarily indicate that
the vehicle being tested will fail the state I/M inspection. For some states,
one or more such monitors may be allowed to be “Not Ready” to pass the
emissions inspection.
 OK – indicates that a particular monitor being checked has completed
its diagnostic testing.
 INC – indicates that a particular monitor being checked has not
completed its diagnostic testing.
 N/A – the monitor is not supported on that vehicle.
1) Use the UP/DOWN scroll button to select I/M Readiness from
Diagnostic Menu and press OK button (Figure 4- 1).
2) Wait a few seconds while the scan tool validates the PID MAP.
3) If the vehicle supports both types of tests, then both types will be
shown on the screen for selection.