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 Infiniti M35hFACTORY OEM SERVICE PROCEDURE
Component Inspection
- CHECK ENGINE COOLANT TEMPERATURE SENSOR
- Turn ignition switch OFF.
- Disconnect engine coolant temperature sensor harness connector.
- Remove engine coolant temperature sensor. Refer to "EXPLODED VIEW ".
- Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure below.
Terminals Condition Resistance (kΞ©) 1 and 2 Temperature [Β°C (Β°F)] 20 (68) 2.37 - 2.63 50 (122) 0.68 - 1.00 90 (194) 0.236 - 0.260 Is the inspection result normal?Β
YES: INSPECTION END
NO: Replace engine coolant temperature sensor. Refer to "EXPLODED VIEW ".
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.