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Cooling Fan Controls Symptom Troubleshooting Index

Symptom
Diagnostic Procedure
Also check for
Engine overheats
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Check the coolant level.
Check for the coolant leakage (from gaskets, hoses, O-rings, etc.).
Check for dirt, leaves, or insects on radiator and condenser.
Check for deteriorated coolant.
Check for damaged or deformed fan shroud.
Check for plugged or deteriorated radiator hoses.
Check for plugged heater core of hoses.
Check for a damaged cylinder head gasket.
The radiator fan does not run when the engine coolant temperature is above 93 °C (199 °F)
Cleanliness and tightness of all connectors
The A/C condenser fan does not run when the engine coolant temperature is above 93 °C (199 °F)
Cleanliness and tightness of all connectors
Both the radiator fan and the A/C condenser fan does not run when the engine coolant temperature is above 93 °C (199 °F)
Cleanliness and tightness of all connectors
The radiator fan run with the ignition switch to ON (II), and the engine coolant temperature below 90 °C (194 °F)
Remove the radiator fan relay.
Cleanliness and tightness of all connectors
The A/C condenser fan run with the ignition switch to ON (II), and the engine coolant temperature below 90 °C (194 °F)
Remove the condenser fan relay.
Cleanliness and tightness of all connectors
Both the radiator fan and the A/C condenser fan run with the ignition switch to ON (II), and the engine coolant temperature below 90 °C (194 °F)
Check for a short in the wire between the radiator fan 4P socket terminal No. 3 and ECM/PCM connector terminal A6.
Cleanliness and tightness of all connectors