Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2012 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Refrigerant Pressure Sensor: Wiring Diagram

Fig 1: Identifying Wiring Diagram With Connector End View (EC-RP/SEN-01)

Courtesy of NISSAN NORTH AMERICA, INC.

Specification data are reference values and are measured between each terminal and ground.

CAUTION: Never use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
39	L	Refrigerant pressure sensor	[Engine is running] Warm-up condition Both A/C switch and blower fan switch: ON (Compressor operates)	1.0 - 4.0 V
40	R/G	Sensor ground (Refrigerant pressure sensor)	[Engine is running] Warm-up condition Idle speed	Approximately 0 V
72	G/W	Sensor power supply (Refrigerant pressure sensor)	[Ignition switch: ON]	Approximately 5 V

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.