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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Cooling System (1AR-FE)) >> Cooling Fan System >> Problem Symptoms Table

Problem Symptoms Table

WARNING: This page is about a different variant/trim than selected.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Cooling Fan System 

PROBLEM SYMPTOMS CHART

Symptom Suspected Area Refer to
Cooling fans do not operate Engine coolant temperature sensor INSPECTION
Cooling fan motor ON-VEHICLE INSPECTION 
No. 2 Cooling fan motor ON-VEHICLE INSPECTION 
Cooling fan relay (FAN MAIN) COOLING FAN RELAY 
Cooling fan circuit COOLING FAN CIRCUIT 
ECM REMOVAL
Cooling fans do not stop (continue to operate) Engine coolant temperature sensor INSPECTION
Cooling fan circuit COOLING FAN CIRCUIT 
Cooling fan ECU COOLING FAN ECU 
ECM REMOVAL
Cooling fan speed does not change Cooling fan circuit COOLING FAN CIRCUIT 
ECM REMOVAL