DTC Confirmation Test
WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition on and wait at least 2 seconds. Select DATA MONITOR mode with scan tool. Start engine and let it idle for 5 seconds. If DTC is detected, go to DIAGNOSTIC PROCEDURE . If DTC is not detected, system is okay at this time.