Radiator Cooling Fan: Testing and Inspection

INSPECTION

Radiator Fan System Wiring Diagram:

Radiator Fan Control Output Waveform:

Operating condition:
Radiator fan operates depending on the radiator fan speed related to engine coolant temperature or the radiator fan speed related to A/C compressor load, whichever is higher as a load condition.
^ Radiator fan speed related to engine coolant temperature

Radiator fan speed related to engine coolant temperature:

^ Radiator fan speed related to A/C compressor load

Radiator fan speed related to A/C compressor load:

DIAGNOSIS:
Radiator main and sub fans do not rotate under the above conditions.

Step 1-3:

Step 4-9: