Component Inspection

1. Turn ignition switch OFF.
2. Remove EVAP control system pressure sensor with its harness connector.

   Always replace O-ring with a new one. 

3. Install a vacuum pump to EVAP control system pressure sensor.
4. Turn ignition switch ON and check output voltage between ECM terminals under the following conditions.
   ECM SPECIFICATION
   
   

   ECM			Applied vacuum kPa (kg/cm2 , psi)	Voltage
   Connector	+	-
   	Terminal	Terminal
   E10	86 (EVAP control system pressure sensor signal)	96 (Sensor ground)	Not applied	1.8 - 4.8 V
   			-26.7 (-0.272, -3.87)	2.1 to 2.5 V lower than above value

   Fig 1: Checking Output Voltage Between ECM Terminals

   Courtesy of NISSAN MOTOR CO., U.S.A.
   CAUTION:

   • Always calibrate the vacuum pump gauge when using it.
   • Never apply below -93.3 kPa (-0.952 kg/cm² , -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm² , 14.69 psi).

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace EVAP control system pressure sensor