With GST

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Lift up drive wheels.
Start engine (TCS switch or VDC switch OFF) and warm it up to normal operating temperature.
Turn ignition switch OFF, wait at least 10 seconds.
Start engine and wait at least 70 seconds.
Set voltmeter probes to ECM terminals 32 (EVAP control system pressure sensor signal) and ground.

Fig 1: Checking EVAP Control System Pressure Sensor Value At Idle Speed
Courtesy of NISSAN MOTOR CO., U.S.A.
Check EVAP control system pressure sensor value at idle speed and note it.
Establish and maintain the following conditions for at least 1 minute.

Fig 2: Testing Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.
Verify that EVAP control system pressure sensor value stays 0.1V less than the value at idle speed (measured at step 6) for at least 1 second.
If NG, go to DIAGNOSTIC PROCEDURE .