Troubleshooting Chart

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Symptom			Check items
Cooling system part malfunction	Poor heat transfer	Water pump malfunction	Worn or loose drive belt	-
		Thermostat stuck closed	-
		Damaged fins	Dust contamination or paper clogging
			Physical damage
		Clogged radiator cooling tube	Excess foreign material (rust, dirt, sand, etc.)
	Reduced air flow	Cooling fan does not operate.	Fan assembly	-
		High resistance to fan rotation.
		Damaged fan blades
	Damaged radiator shroud	-	Radiator shroud	-
	Improper coolant mixture ratio	-	Coolant viscosity	-
	Poor coolant quality	-		-
	Insufficient coolant	Coolant leaks	Cooling hose	Loose clamp
				Cracked hose
			Water pump	Poor sealing
			Radiator cap	Loose radiator cap
				Poor sealing
			Radiator	O-ring for damage, deterioration or improper fitting
				Cracked radiator tank
				Cracked radiator core
			Reservoir tank	Cracked reservoir tank
		Overflowing reservoir tank	Exhaust gas leaks into cooling system	Cylinder head deterioration
				Cylinder head gasket deterioration
Except cooling system part malfunction	-	Overload on engine	Abusive driving	High engine RPM under no load
				Driving in low gear for extended time
				Driving at an extremely high speed
			Powertrain system malfunction	-
			Improper size of installedwheels and tires
			Dragging brakes
			Improper ignition timing
	Blocked or restricted air flow	Blocked bumper	Blocked air flow	-
		Blocked radiator grille	Installed car brassiere
			Mud contamination or paper clogging
		Blocked radiator	Blocked air flow
		Blocked condenser
		Installed large fog lamp