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Engine Cooling Symptom Diagnosis

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE COOLING DIAGNOSTIC INFORMATION AND PROCEDURES

Condition Possible Cause Action
Engine overheats (Radiator fan operates)  Loose or broken accessory drive belt Check accessory drive belt  See ACCESSORY DRIVE BELT TENSION INSPECTION .
Not enough coolant Check coolant level and add as necessary  .
Faulty thermostat Check thermostat  See Thermostat Inspection .
Faulty water pump Check water pump  See Water Pump Inspection .
Dirty or bent radiator fins Clean or remedy  .
Coolant leakage on cooling system Check cooling system for leakage  See Engine Cooling System Inspection .
Clogged radiator Replace radiator  . See Radiator Removal and Installation 
Faulty radiator cap Check radiator cap  .
Dragging brakes Check brake  See BRAKES SYMPTOM DIAGNOSIS .
Slipping clutch Check clutch  See CLUTCH SYSTEM SYMPTOM DIAGNOSIS .
Poor charged battery Check battery  .
Poor electricity generated by generator Check generator  See GENERATOR TEST .
ECT sensor faulty Check ECT sensor  . See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION
Radiator cooling fan motor faulty Check radiator cooling fan motor  . See Radiator Cooling Fan Assembly On-Vehicle Inspection 
ECM faulty Check ECM and its circuit  . See INSPECTION OF ECM AND ITS CIRCUITS
Wiring or grounding faulty Repair wiring  .
Equipped with too many additional electrical part(s) Dismount them  .
Engine overheats (Radiator fan does not operate)  Fuse blown Check fuse  .
Radiator cooling fan relay faulty Check radiator cooling fan relay  . See Radiator Cooling Fan Relay Inspection 
ECT sensor faulty Check ECT sensor  . See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION
Radiator cooling fan motor faulty Check radiator cooling fan motor  . See Radiator Cooling Fan Assembly On-Vehicle Inspection 
Wiring or grounding faulty Repair as necessary. 
ECM faulty Check ECM and its circuit  . See INSPECTION OF ECM AND ITS CIRCUITS