2. Check Refrigerant Pressure Sensor Power Supply Circuit

WARNING: This page is about a different car, the 2004 Nissan Maxima. 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.
Turn ignition switch ON.

Fig 1: Disconnect Refrigerant Pressure Sensor Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.
1. Voltage: Approximately 5V

OK or NG

OK : GO TO 4 .
NG : GO TO 3.

Fig 2: Check Voltage

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