Engine overheats (When radiator cooling fan operates)

Precautions: Precautions for Cooling System · General safety (00)

Condition	Possible Cause	Action
Engine overheats (When radiator cooling fan operates)	Loose or broken generator drive belt	Replace generator drive belt and/or generator drive belt tensioner.
	Not enough coolant	Check coolant level and add coolant if necessary.
	Faulty thermostat	Replace thermostat assembly.
	Faulty water pump	Replace water pump.
	Dirty or bent radiator fins	Clean or repair radiator.
	Coolant leakage	Repair cooling system.
	Clogged radiator	Check and replace radiator if necessary. •Check:   •Replace:
	Faulty degassing tank cap	Replace degassing tank cap.
	Dragging brakes	Check brake.
	Slipping clutch	Replace clutch cover and clutch disc.
	Poorly charged battery	Check and replace battery if necessary. •Check:   •Replace:
	Poor electricity generated by generator	Check and replace generator if necessary. •Check:   •Replace:
	Faulty ECT sensor	Check and replace ECT sensor if necessary. •Check:   •Replace:
	Faulty radiator cooling fan motor	Check and replace radiator cooling fan motor if necessary. •Check:   •Replace:
	Faulty radiator cooling fan relay	Check and replace radiator cooling fan relay if necessary.
	Faulty ECM	Check and replace ECM if necessary.
	Faulty wiring or grounding	Repair wiring.
	Equipped with too much electric load part(s)	Dismount.