EVAP Control System Pressure Sensor

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 terminal 32 and ground under the following conditions.

VOLTAGE SPECIFICATION

Applied vacuum kPa (kg/cm² , psi)	Voltage (V)
Not applied	1.8 - 4.8
-26.7 (-200, -7.87)	2.1 to 2.5V lower than above value

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 inHg).

Fig 1: Checking Output Voltage Between ECM Terminal 32 And Ground

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