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.

2008 Infiniti G35 BaseFACTORY 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.

Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure.

TERMINAL RESISTANCE REFERENCE CHART

Terminals	Condition		Resistance
1 and 2	Temperature °C (°F)	20 (68)	2.37 - 2.63 kΩ
		50 (122)	0.68 - 1.00 kΩ
		90 (194)	0.236 - 0.260 kΩ

Is the inspection result normal?

YES: INSPECTION END

NO: Replace engine coolant temperature sensor.

Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals By Heating With Hot Water

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

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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.