FYI, from GM eSI:
Document ID# 684318
2002 Chevrolet Camaro
Powertrain Control Module (PCM) Description
...

System Status and Drive Cycle For Inspection/Maintenance

The System Status selection is included in the scan tool System Info menu.

Several states require that the I/M (OBD ll system) pass on-board tests for the major diagnostics prior to having a vehicle emission inspection. This test is also a requirement to renew the license plates in some areas.

Using a scan tool, the technician can observe the System Status of Complete or Not Complete in order to verify that the vehicle meets the criteria to comply with local requirements. Using the System Status display, any of the following systems or combination of systems may be monitored for I/M Readiness:

* The catalyst
* The EVAP system
* The HO2S
* The HO2S heater
* The EGR system
* The AIR system

Important

The System Status display indicates only whether the test has been completed. The System Status display does not indicate whether the test has passed. If a Failed Last Test indication is present for a DTC associated with one of the above systems, diagnosis and repair is necessary in order to meet the I/M requirement. Verify that the vehicle passes all of the diagnostic tests associated with the displayed System Status prior to returning the vehicle to the customer. Refer to the Typical Drive Cycle table to use as a guide to complete the I/M System Status tests. More than one drive cycle may be necessary.

Following a DTC info clear, System Status will clear for one or all of these systems. Following a battery disconnect or a PCM replacement, all System Status information will clear.


Typical Drive Cycle

Diagnostic Time Schedule for I/M Readiness

Vehicle Drive Status


What is Monitored?

Cold Start, coolant temperature less than 50°C (122°F)


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Idle 2.5 minutes in Drive (Auto) Neutral (Man), A/C and rear defogger ON


HO2S Heater, Misfire, Secondary Air, Fuel Trim, EVAP Purge

A/C off, accelerate to 90 km/h (55 mph), 1/2 throttle.


Misfire, Fuel Trim, Purge

3 minutes of Steady State - Cruise at 90 km/h (55 mph)


Misfire, EGR, Secondary Air, Fuel Trim, HO2S, EVAP Purge

Clutch engaged (Man), no braking, decelerate to 32 km/h (20 mph)


EGR, Fuel Trim, EVAP Purge

Accelerate to 90-97 km/h (55-60 mph), 3/4 throttle


Misfire, Fuel Trim, EVAP Purge

5 minutes of Steady State Cruise at 90-97 km/h (55-60 mph)


Catalyst Monitor, Misfire, EGR, Fuel Trim, HO2S, EVAP Purge

Decelerate, no braking. End of Drive Cycle


EGR, EVAP Purge

Total time of OBD II Drive Cycle 12 minutes


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It looks at a certain number of tests and results. The cycle can be run manually by driving the car a certain way, or the PCM will run it when it gets good and ready. If the battery is disconnected, the cycle restarts and all tests will have to be repeated.
This link shows the tests that have to be sucessfully completed before the PCM declares that the car has passed smog requirements. If you have a scanner connected during the drive cycle, you can watch the switchover from not ready to ready. Good to have someone look at the scanner while the other person does the driving. lol
http://www.obdii.com/drivecycle.html