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 Infiniti M35 BaseFACTORY OEM SERVICE PROCEDURE
Refrigerant Pressure Sensor: Wiring Diagram
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not 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.
ECM TERMINALS WITH VOLTAGE SPECIFICATION
| TERMINAL NO. | WIRE COLOR | ITEM | CONDITION | DATA (DC Voltage) |
|---|---|---|---|---|
| 49 | B/Y | Sensor power supply (Refrigerant pressure sensor, Battery current sensor) | [Ignition switch: ON] | Approximately 5V |
| 67 | B/W | Sensor ground | [Engine is running]
|
Approximately 0V |
| 70 | L/R | Refrigerant pressure sensor | [Engine is running]
|
1.0 - 4.0V |
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.