Entering Diagnostic Test Mode II (Front HO2S Monitoring)

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

Enter self-diagnostic results mode. See ENTERING DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS MODE) .
Start engine. ECM has now entered front HO2S monitoring.
To switch from bank 1 to bank 2 or from bank 2 to bank 1, fully depress and release accelerator pedal quickly.
Ensure monitoring sensor has changed by flashing MIL as shown. See Fig 1.

Fig 1: Switching Monitored Sensor In Front HO2S Monitoring Mode

Courtesy of NISSAN MOTOR CO., U.S.A.