Overall Function Check

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 

1. Lift up drive wheels.
2. Start engine (TCS switch or VDC switch OFF) and warm it up to normal operating temperature.
3. Turn ignition switch OFF, wait at least 10 seconds.
4. Start engine and wait at least 70 seconds.
5. Set voltmeter probes to ECM terminals 32 (EVAP control system pressure sensor signal) and ground.
6. Check EVAP control system pressure sensor value at idle speed and note it.
7. Establish and maintain the following conditions for at least 1 minute.
   Fig 1: Identifying Testing Conditions For Purge Flow Monitoring Status (DVOM)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Testing EVAP Control System Purge Flow Monitoring Status (DVOM)

   Courtesy of NISSAN MOTOR CO., U.S.A.
8. 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.
9. If NG, Go to DIAGNOSTIC PROCEDURE .