On-Vehicle Inspection

ELECTRIC COOLING FAN SYSTEM CIRCUIT




ON-VEHICLE INSPECTION

Low Temperature (Below 83°C (181°F))





1. TURN IGNITION SWITCH "ON"
Check that the cooling fan stops.
If not, check that cooling fan relays and engine coolant temperature switch, and check for a separated connector or severed wire between the cooling fan relay and engine coolant temperature switch.





2. DISCONNECT ENGINE COOLANT TEMPERATURE SWITCH CONNECTOR
Check that the cooling fan rotates.
If not, check the cooling fan relays, cooling fan, engine main relay and fuse, and check for a short circuit between the cooling fan relay and engine coolant temperature switch.

3. CONNECT ENGINE COOLANT TEMPERATURE SWITCH CONNECTOR

High Temperature (Above 94°C (201°F))





4. START ENGINE
(a) Raise engine coolant temperature to above 94°C (201°F).
(b) Check that the cooling fan rotates.

If not, replace the engine coolant temperature switch.