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.
Start engine again and let it idle for at least 10 minutes.
The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to "DIAGNOSTIC PROCEDURE ".

Fig 1: Identifying Consult-II Work Support
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for 10 minutes. Refer to the table below.
  Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same time.

Fig 2: Speed Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.
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, check exhaust and intake air leak visually.