1. Check Refrigerant Pressure Sensor Overall Function

1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch ON.
3. Check voltage between ECM terminal 70 and ground with CONSULT-II or tester.
   1. Voltage: 1.0 - 4.0V 

OK or NG 

OK >> INSPECTION END 

NG >> GO TO 2. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT .

Fig 1: Check Voltage Between ECM Terminal 70 And Ground

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