LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1454 (Engine Controls - Pinpoint Test JE: Integrated Ignition Coil Pack Through Pinpoint Test Z: Intermittent - (Except Diesel & Hybrid)) >> PINPOINT TEST KN: Variable Speed Electric Cooling Fan Motor >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2014 Lincoln Navigator, 2014 Lincoln MKZ, 2014 Lincoln MKX, 2014 Lincoln MKT, and 2014 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.
  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.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-) CF Module Connector, Harness Side
      FANPWR - Pin 1 GND - Pin 2

    Is the voltage greater than 10.5 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 (-)
      FANPWR - Pin 1 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. For Escape, and Focus, GO to  KN15.
    For all others, REPAIR the open circuit.
    Clear the PCM DTCs. REPEAT the self-test.
  4. KN4 CHECK THE FCV CIRCUIT(S) 
    • Connect the 1.6K ohms resistor between the FCV and FANPWR circuits at the CF module harness connector (this simulates cooling fan circuitry).
    • Ignition ON, engine OFF.
    • Carry out the PCM 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.
    NOTE: For vehicles equipped with dual cooling fans, both cooling fans must be checked for correct operation.
    NOTE: Allow the cooling fan to operate for a minimum of two minutes and observe for any noise or binding.
    NOTE: With the cooling fan motor disconnected voltage may not be present at the cooling fan module. Do not measure voltage at the cooling fan motor.
    • CF Motor connector disconnected.
    • Connect a 30 amp fused jumper wire between the VPWR circuit at the CF motor connector harness side and the vehicle battery positive terminal side.
    • Connect a 30 amp fused jumper wire between the GND circuit at the CF motor connector harness side and the vehicle battery negative terminal side.

    Does the cooling fan motor operate correctly? 

    Yes No
    INSTALL a new CF module. REFER to the orkshop Manual Section Engine Cooling.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new CF motor. REFER to the applicable service information article, Engine Cooling.
    Clear the PCM DTCs. REPEAT the self-test.
  6. KN6 CHECK THE FCV CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-)
      FCV - Pin 4 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. GO to KN7  .
  7. KN7 CHECK THE FCV CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between:
      (+) CF Module Connector, Harness Side (-)
      FCV - Pin 4 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to KN8  . REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.
  8. KN8 CHECK FOR AN OPEN CIRCUIT BETWEEN THE PCM AND COOLING FAN MODULE 
    • Measure the resistance between:
      (+) PCM Connector, Harness Side (-) CF Module Connector, Harness Side
      FCV FCV - Pin 4

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  KN17. REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  9. KN9 CHECK THE FANPWR AND GND CIRCUIT FOR AN INTERMITTENT CONCERN 
    • 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.
    • Ignition ON, engine OFF.
    • Connect a non-powered test lamp between:
      Point A CF Module Connector, Harness Side Point B CF Module Connector, Harness Side
      FANPWR - Pin 1 GND - Pin 2
    • Observe the test lamp for an indication of a concern while carrying out the following. Note that the lamp turns off when a concern is present.
      • shake, wiggle, and bend the FANPWR and GND circuits to the CF
      • shake, wiggle, and bend the associated fuse

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to KN10  .
  10. KN10 CHECK THE FCV CIRCUIT(S) FOR INTERMITTENT CONCERNS 
    • Connect the 1.6K ohms resistor between the FCV and FANPWR circuits at the CF module harness connector (this simulates cooling fan circuitry).
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-)
      FCV - Pin 4 Ground
    • Ignition ON, engine OFF.
    • Access the PCM and control the FAN_DSD (PER) PID.
    • Command the fan to full ON.
    • Observe the digital multimeter (DMM) for an indication of a concern while shaking, wiggling, and bending the FCV circuit between the CF motor and the PCM. Note that voltage changes suddenly when a concern is detected.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to PINPOINT TEST Z .
  11. KN11 COOLING FAN DOES NOT OPERATE (WITH NO DTCS): COMMAND THE COOLING FAN ON TO CHECK OPERATION 
    • Carry out the KOEO self-test.
    • Listen to the cooling fan.

    Does the cooling fan operate sometime during the KOEO self-test? 

    Yes No
    The concern is elsewhere. RETURN to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for further direction. GO to KN12  .
  12. KN12 CHECK THE FANPWR AND GND CIRCUITS TO THE COOLING FAN MODULE 
    • 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.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-) CF Module Connector, Harness Side
      FANPWR - Pin 1 GND - Pin 2

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to KN13  . GO to  KN14.
  13. KN13 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.
    NOTE: For vehicles equipped with dual cooling fans, both cooling fans must be checked for correct operation.
    NOTE: Allow the cooling fan to operate for a minimum of two minutes and observe for any noise or binding.
    NOTE: With the cooling fan motor disconnected voltage may not be present at the cooling fan module. Do not measure voltage at the cooling fan motor connector on the cooling fan module.
    • CF Motor connector disconnected.
    • Connect a 30 amp fused jumper wire between the VPWR circuit at the CF motor connector harness side and the vehicle battery positive terminal side.
    • Connect a 30 amp fused jumper wire between the GND circuit at the CF motor connector harness side and the vehicle battery negative terminal side.

    Does the cooling fan motor operate correctly? 

    Yes No
    INSTALL a new CF module. REFER to the applicable service information article, Engine Cooling.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new CF motor. REFER to the applicable service information article, Engine Cooling.
    Clear the PCM DTCs. REPEAT the self-test.
  14. KN14 CHECK THE VOLTAGE TO THE COOLING FAN USING GROUND AS A REFERENCE 
    • Measure the voltage between:
      (+) CF Module Connector, Harness Side (-)
      FANPWR - Pin 1 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. For Escape, and Focus, GO to KN15  .
    For all others, REPAIR the open circuit.
    Clear the PCM DTCs. REPEAT the self-test.
  15. KN15 CHECK FOR AN OPEN CIRCUIT 
    • Ignition OFF.
    • FC Relay connector disconnected.
    • Measure the resistance between:
      (+) FC Relay Connector, Harness Side (-)
      GND Ground
    • Measure the resistance between:
      (+) FC Relay Connector, Harness Side (-) CF Module Connector, Harness Side
      FANPWR FANPWR - Pin 1

    Are the resistances less than 5 ohms? 

    Yes No
    GO to KN4  . REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  16. KN16 CHECK FOR VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) FC Relay Connector, Harness Side (-)
      VBATT Ground
      ISP-R Ground

    Are the voltages greater than 10.5 V? 

    Yes No
    INSTALL a new FC relay. Clear the PCM DTCs. REPEAT the self-test. REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  17. KN17 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
scientia non olet · About LEMON Manuals