Overall Function Check

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

Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring. During this check, a 1st trip DTC might not be confirmed.

WITH GST

Lift up drive wheels.
Start engine (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.
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 1: Check Conditions
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Voltage
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 .