EVAP Control System Pressure Sensor

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister. Always replace O-ring 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.

APPLIED VACUUM KPA (MMHG, INHG) AND VOLTAGE V

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: Checking Output Voltage Between ECM Terminal 32 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.