Engine Cooling Symptom Diagnosis

WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara, 2007 Suzuki Grand Vitara, and 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE COOLING SYMPTOM DIAGNOSIS REFERENCE

Condition	Possible Cause	Action
Engine overheats (Radiator fan operates)	Loose or broken water pump belt	Adjust or replace .
	Not enough coolant	Check coolant level and add as necessary .
	Faulty thermostat	Replace .
	Faulty water pump	Replace .
	Dirty or bent radiator fins	Clean or remedy .
	Coolant leakage on cooling system	Repair .
	Clogged radiator	Check and replace radiator as necessary .
	Faulty radiator cap	Replace .
	Improper ignition timing	Refer to IGNITION SYSTEM SYMPTOM DIAGNOSIS .
	Dragging brakes	Adjust brake .
	Slipping clutch	Adjust or replace .
	Poor charge battery	Check and replace as necessary .
	Poor generation generator	Check and repair .
	ECT sensor faulty	Check and replace as necessary .
	Radiator cooling fan relay No. 2 and/or No. 3 faulty	Check and replace as necessary .
	Radiator fan motor faulty	Check and replace as necessary .
	ECM faulty	Check and replace as necessary .
	Wiring or grounding faulty	Repair as necessary .
	Equipped with too much electric load part(s)	Dismount .
Engine overheats (Radiator fan does not operate)	Fuse blown	Check radiator fan fuse of relay/fuse box and check for short circuit to ground .
	Radiator cooling fan relay No. 1 faulty	Check and replace as necessary .
	ECT sensor faulty	Check and replace as necessary .
	Radiator cooling fan motor faulty	Check and replace as necessary .
	Wiring or grounding faulty	Repair as necessary .
	ECM faulty	Check and replace as necessary .