In regards to I/M readiness testing,found an easy way to know if your vehicle is ready after repair work or battery removal. Z 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 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 is designed to check the emission control system
during normal driving. A complete check may take several days. If the
vehicle is not ready for I/M testing, the following driving cycle consisting
of mixed city and highway driving may be performed:
15 minutes of steady driving on an expressway or highway 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 the engine is
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, the above driving
cycle will have to be repeate