EVAP Control System Pressure Sensor

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.

VOLTAGE REFERENCE CHART

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 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