2. Check Refrigerant Pressure Sensor Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

Turn A/C switch and blower switch OFF.
Stop engine.
Disconnect refrigerant pressure sensor harness connector.

Fig 1: Locating Refrigerant Pressure Sensor Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.

Fig 2: Checking Power Supply Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.
1. Voltage: Approximately 5V

OK or NG

OK: GO TO 4.

NG: GO TO 3.