Component Inspection

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Turn ignition switch OFF.
Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
Install a vacuum pump to EVAP control system pressure sensor.

Turn ignition switch ON and check output voltage between ECM terminals under the following conditions.

ECM			Applied vacuum kPa (kg/cm² , psi)	Voltage
Connector	+	-
Connector	Terminal	Terminal
E10	86 (EVAP control system pressure sensor signal)	96 (Sensor ground)	Not applied	1.8 - 4.8 V
E10	86 (EVAP control system pressure sensor signal)	96 (Sensor ground)	-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 NORTH AMERICA, INC.

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. Refer to "REMOVAL AND INSTALLATION ".