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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 864 (Noise, Vibration And Harshness) >> Diagnostic Tests >> Noise, Vibration and Harshness (NVH) >> Pinpoint Tests >> Pinpoint Test E: Engine Driven Cooling Fan Moan

Pinpoint Test E: Engine Driven Cooling Fan Moan

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. E1 CHECK THE ENGINE DRIVEN COOLING FAN AFTER A COLD SOAK 
    • Carry out the Vehicle Cold Soak Procedure in this article.
    • Key in START position.
    • Assess the airflow.
    • Raise the engine speed to 1500 RPM while listening for the moan to increase in proportion to the airflow.
    • Key in OFF position.
    • Does the moan increase in proportion to the airflow? 
    1. YES  : TEST the fan for normal operation. If the fan tests normal, go to  E2 . Otherwise, REPAIR as necessary.
    2. NO  : Normal system operation.
  2. E2 CHECK THE ENGINE DRIVEN COOLING FAN AT NORMAL OPERATING TEMPERATURE 
    • Key in START position.
    • Run the engine to normal operating temperature while listening for the moan to stop.
    • Key in OFF position.
    • Does the moan stop? 
    1. YES  : Normal clutch operation.
    2. NO  : INSTALL a new fan clutch. TEST the system for normal operation.
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