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.

2007 Nissan-Datsun Altima BaseFACTORY OEM SERVICE PROCEDURE

Component Function Check

CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

Start engine and warm it up to normal operating temperature.
Turn A/C switch and blower fan switch ON.

Check the voltage between ECM harness connector and ground.

VOLTAGE SPECIFICATION

ECM		Ground	Voltage
Connector	Terminal	Ground	Voltage
E219	39 (Refrigerant pressure sensor signal)	Ground	1.0-4.0V

Is the inspection result normal?

YES: INSPECTION END

NO: Go to "DIAGNOSIS PROCEDURE ".

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.