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HOMESERVICE MANUALSFORD2010TAURUS SEL, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - PINPOINT TEST KN: VARIABLE SPEED ELECTRIC COOLING FAN THROUGH PINPOINT TEST Z: INTERMITTENT - (EXCEPT DIESEL & HYBRID)PINPOINT TEST KN: VARIABLE SPEED ELECTRIC COOLING FANTEST PROCEDURE
2010 Ford Taurus SEL, FWD

Test Procedure

2010 Ford Taurus SEL, FWDSECTION Test Procedure
  1. KN1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Is DTC P0480 present? 

    Yes No
    For KOEO and KOER DTC P0480, GO to  KN2.
    For continuous memory DTC P0480, GO to  KN9.    		 For electric cooling fan(s) always on. GO to  KN4.
    For electric cooling fan(s) does not operate (low, medium, high or variable speed), GO to  KN11.
  2. KN2 CHECK FOR A MECHANICAL CONCERN WITH THE COOLING FAN MOTOR OR FOR OBSTRUCTIONS LIMITING THE COOLING FAN MOTOR OPERATION 
    • Ignition OFF.
    • CF Module connector disconnected.
    • Rotate the cooling fan by hand. The cooling fan should rotate freely, with no abnormal binding. If binding is present, remove any foreign materials or install a new cooling fan as required.
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-) CF Module Connector, Harness Side
      B+ - Pin 1 GND - Pin 2

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KN4. GO to  KN3.
  3. KN3 CHECK THE VOLTAGE TO THE COOLING FAN MODULE USING GROUND AS A REFERENCE 
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-)
      B+ - Pin 1 Ground

    Is the voltage greater than 10 V? 

    Yes No
    REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test. A B+ circuit concern is present. CHECK the condition of the related fuse/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is damaged, CHECK the circuit for a short to ground before installing a new fuse/fuse link.
  4. KN4 CHECK THE FCV CIRCUIT(S) 
    • Connect the 1.6K ohms resistor between the FCV and B+ circuits at the CF module harness connector (this simulates cooling fan circuitry).
    • Ignition ON, engine OFF.
    • Carry out the KOEO self-test.

    Is DTC P0480 present? 

    Yes No
    GO to  KN6. GO to  KN5.
  5. KN5 CHECK THE COOLING FAN MOTOR OPERATION 
    NOTE: Both 30 amp fused jumper wires should be connected to the wiring harness that directly connects to the cooling fan motor.
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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.