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Readiness for
Inspection/Maintenance (I/M)
Testing
Some state/provincial and local
governments may have
Inspection/Maintenance (I/M) programs to
inspect the emission control equipment on
your vehicle. Failure to pass this inspection
could prevent you from getting a vehicle
registration.
If the service engine soon indicator
is on or the bulb does not work, you
may need to have the vehicle
serviced. See On-Board Diagnostics (OBD-II).
Your vehicle may not pass the I/M test if the
service engine soon indicator is on or not
working properly (bulb is burned out), or if
the OBD-II system has determined that some
of the emission control systems have not
been properly checked. In this case, your
vehicle is not ready for I/M testing.
If the vehicle's engine or transmission has just
been serviced, or the battery has recently run
down or been replaced, the OBD-II system
may indicate that the vehicle is not ready for
I/M testing. To determine if the vehicle is
ready for I/M testing, turn the ignition key to
the on position for 15 seconds without
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Fuel and Refueling
cranking the engine. If the service engine soon
indicator blinks eight times, it means that the
vehicle is not ready for I/M testing; if the
service engine soon indicator stays on solid,
it means that the vehicle is ready for I/M
testing.
The OBD-II system monitors the emission
control system during normal driving. A
complete check may take several days. If the
vehicle is not ready for I/M testing, you may
need to perform the following driving cycle
consisting of mixed city and highway driving:
Drive on an expressway or highway for a
steady 15 minutes, followed by 20 minutes
of stop-and-go driving with at least four
30-second idle periods.
Allow the vehicle to sit for at least eight hours
without starting the engine. Then, start the
engine and complete the above driving cycle.
The engine must warm up to its normal
operating temperature. Once started, do not
turn off the engine until the above driving
cycle is complete. If the vehicle is still not
ready for I/M testing, you will have to repeat
the above driving cycle.
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