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Home >> Ford >> 2020 >> Fusion Titanium Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 43 (Climate Control System - General Information (2 Of 2) (Except Hybrid)) >> Diagnosis And Testing >> Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) >> Pinpoint Tests >> Pinpoint Test J : The Blower Motor Is Inoperative

Pinpoint Test J : The Blower Motor Is Inoperative

WARNING: This page is about a different variant/trim than selected.
  1. Refer to Manual Climate Control System for schematic and connector information.

    Normal Operation and Fault Conditions 

    Voltage is supplied to the blower motor relay from the BJB. When the blower motor relay coil receives power from the FCIM, the relay coil is energized and voltage is delivered to the blower motor speed control. Power and ground for the blower motor is provided by the blower motor speed control. The FCIM sends a Pulse Width Modulated (PWM) signal to the blower motor speed control to control the blower speed.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    FCIM B10AF:11 Blower Fan Relay: Circuit Short To Ground Module senses low voltage on the relay coil voltage circuit when the module is energizing the circuit. Blower relay is permanently inactive.
    FCIM B10AF:13 Blower Fan Relay: Circuit Open Module senses greater than expected voltage on the blower relay coil voltage circuit, indicating an open circuit. The blower motor relay is inactive.
    FCIM B10B9:12 Blower Control: Circuit Short To Battery Module senses high voltage on the blower motor control PWM circuit, indicating a short directly to voltage. The blower motor is inoperative.
    FCIM B10B9:14 Blower Control: Circuit Short To Ground Or Open Module senses no voltage on the blower motor control PWM circuit, indicating a short directly to ground or an open circuit. The blower motor runs at full speed if the circuit is shorted to ground. The blower motor is inoperative if the circuit is open.

    Possible Sources 

    • Fuse
    • Wiring, terminals or connectors
    • Blower motor relay
    • Blower motor
    • Blower motor speed control
    • FCIM

    Visual Inspection and Pre-checks 

    • Make sure BJB fuse 79 (40A) is OK.

  2. NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  3. J1 CHECK THE BLOWER MOTOR RELAY

    • Ignition OFF.

    • Disconnect Blower motor relay.

    Does the relay pass the component test? 

    Yes  GO to  J2
    No  INSTALL a new blower motor relay.

  4. J2 CHECK THE BLOWER MOTOR RELAY SWITCH CONTACT SUPPLY VOLTAGE

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Blower motor relay socket 3
      GFD484166Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  J3
    No  VERIFY BJB fuse 79 (40A) is OK. If OK, REPAIR the circuit. If not OK, REFER to Oem Electrical Wiring Diagram Introduction (Except Hybrid) to identify the possible causes of the circuit short.

  5. J3 CHECK THE BLOWER MOTOR RELAY COIL GROUND CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Blower motor relay socket 1
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  J4
    No  REPAIR the circuit.

  6. J4 CHECK THE BLOWER MOTOR RELAY COIL CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect FCIM C2402A.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Blower motor relay socket 2
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  J5
    No  REPAIR the circuit.

  7. J5 CHECK THE BLOWER MOTOR RELAY COIL CONTROL CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Blower motor relay socket 2
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 C2402A-11

    Is the resistance less than 3 ohms? 

    Yes  GO to  J6
    No  REPAIR the circuit.

  8. J6 CHECK THE BLOWER MOTOR SPEED CONTROL VOLTAGE CIRCUIT

    • Ignition OFF.

    • Disconnect Blower motor speed control C297A.

    • Connect Blower motor relay.

    • Connect FCIM C2402A.

    • Ignition ON.

    • Select PANEL on the HVAC controls.

    • Select the highest blower motor setting.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C297A-6
      GFD484166Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  J7
    No  REPAIR the circuit.

  9. J7 CHECK THE BLOWER MOTOR SPEED CONTROL GROUND CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C297A-5
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  J8
    No  REPAIR the circuit.

  10. J8 CHECK THE BLOWER MOTOR CONTROL PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect FCIM C2402A.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2402A-23
      GFD484166Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  J9

  11. J9 CHECK THE BLOWER MOTOR CONTROL PWM (PULSE WIDTH MODULATION) CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2402A-23
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 C297A-3

    Is the resistance less than 3 ohms? 

    Yes  GO to  J10
    No  REPAIR the circuit.

  12. J10 CHECK THE OUTPUTS TO THE BLOWER MOTOR

    • Disconnect Blower motor C2004.

    • Connect Blower motor speed control C297A.

    • Connect FCIM C2402A.

    • Ignition ON.

    • Select PANEL on the HVAC controls.

    • Select the highest blower motor setting.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2004-1
      GFD484166Courtesy of FORD MOTOR COMPANY
      		 C2004-2

    Is the voltage greater than 11 volts? 

    Yes  INSTALL a new blower motor. REFER to Blower Motor  .
    No  GO to  J11

  13. J11 CHECK THE CIRCUITS TO THE BLOWER MOTOR FOR AN OPEN

    • Ignition OFF.

    • Disconnect Blower motor speed control C297B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C297B-2
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 C2004-1
      C297B-1
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 C2004-2

    Are the resistances less than 3 ohms? 

    Yes  GO to  J12
    No  REPAIR the circuit in question.

  14. J12 CHECK THE BLOWER MOTOR CIRCUITS FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C297B-1
      GFD484170Courtesy of FORD MOTOR COMPANY
      		 C297B-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  J13
    No  REPAIR the circuits.

  15. J13 CHECK FOR CORRECT BLOWER MOTOR SPEED CONTROL OPERATION

    • Ignition OFF.

    • Disconnect and inspect all the blower motor speed control connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Connect the blower motor speed control connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  INSTALL a new blower motor speed control. REFER to Blower Motor Speed Control  . TEST the system for normal operation. If the concern is still present, GO to  J14
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

  16. J14 CHECK FOR CORRECT FRONT CONTROLS INTERFACE MODULE (FCIM) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all the FCIM connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the FCIM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Refer to FCIM Guided Routine .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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