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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Engine & Automatic Transmission Cooling System >> Engine >> Fan-Radiator >> Operation >> Operation - 5.7L/3.0L Diesel >> Activating The Hydraulic Fan With The Scan Tool

Activating The Hydraulic Fan With The Scan Tool

Under the Engine Systems test heading, there is a subheading. "Hydraulic fan solenoid test", that has the selections, on/off. Activating the fan with the scan tool will run the fan at 100% duty cycle, which will help troubleshoot any system problems, and also help with the deaeration procedure.

NOTE: Engine must be running to activate the fan with the scan tool.
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