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EVAP Control System Pressure Sensor

Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister
Do not reuse the O-ring, replace it 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 CONDITION

Applied vacuum kPa (mmHg, inHg)	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.
Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).

If NG, replace EVAP control system pressure sensor.

Fig 1: Connecting Pump To EVAP Control System Pressure Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.