EVAP Control System Pressure Sensor

WARNING: This page is about a different car, the 2010 Infiniti M45. 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.
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 CONNECTOR TERMINALS REFERENCE CHART

Applied vacuum [kPa (kg/cm² , psi)]	Voltage
Not applied	1.8 - 4.8 V
-26.7 (-0.272, -3.87)	2.1 to 2.5 V lower than above value

CAUTION:

Always calibrate the vacuum pump gauge when using it.
Do not apply vacuum below -93.3 kPa (-0.952 kg/cm² , - 13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm² , 14.69 psi).

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

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

If NG, replace EVAP control system pressure sensor.