With Consult-II

Start engine and warm it up to normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON and select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-II.
Clear the self-learning control coefficient by touching "CLEAR".
Select "DATA MONITOR" mode with CONSULT-II.

Fig 1: Identifying Work Support Mode Of Consult-II
Courtesy of NISSAN MOTOR CO., U.S.A.
Start engine again and let it idle for at least 10 minutes.
The 1st trip DTC P0172 should be detected at this stage, if a malfunction exists. If so, go to "DIAGNOSTIC PROCEDURE ".
If it is difficult to start engine at step 6, the fuel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal. If engine starts, go to "DIAGNOSTIC PROCEDURE ". If engine does not start, remove ignition plugs and check for fouling, etc.

Fig 2: Identifying Data Monitor Mode Of Consult-II
Courtesy of NISSAN MOTOR CO., U.S.A.