Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2009GRAND CHEROKEE 2WD V8-4.7L FLEX FUELREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMRADIATOR COOLING FANTESTING AND INSPECTION
2009 Jeep Grand Cherokee 2WD V8-4.7L Flex Fuel
Radiator Cooling Fan: Testing and Inspection
2009 Jeep Grand Cherokee 2WD V8-4.7L Flex FuelSECTION Testing and Inspection
ELECTRIC RADIATOR FAN
The powertrain control module (PCM) will enter a diagnostic trouble code (DTC) in memory if it detects a problem in the auxiliary cooling fan relay or circuit. Emissions Control - Description.
If the electric cooling fan is inoperative, check the 15A fuse in the junction block and the 40A fuse in the Power Distribution Center (PDC) with a 12 volt test lamp or DVOM. Refer to the inside of the power distribution center cover for the exact location of the fuse. If fuses are okay, refer to ELECTRICAL SCHEMATICS for the cooling fan and relay circuit schematic.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.