Conditions For Setting DTC

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 Pontiac Grand Prix, 2002 Pontiac Bonneville, 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, and 2002 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

The actual engine speed is 100 RPM less than the desired engine speed for more than 8 seconds for each test.
The PCM detects the IAC test failed 5 consecutive times per ignition cycle.
The vehicle must criteria and leave the criteria for 1 second in order to complete one test.