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Home >> Ford >> 2018 >> Taurus Limited, FWD, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 110 (Transmission Cooling - 6-Speed Automatic Transmission - 6F15) >> Diagnosis And Testing >> Transmission Cooling >> Pinpoint Tests >> Pinpoint Test A : Transmission Fluid Heater Coolant Control Valve

Pinpoint Test A : Transmission Fluid Heater Coolant Control Valve

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
  1. NOTE: 1.0L EcoBoost only.

    Possible Sources 

    • Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
    • Fuse
    • Transmission Fluid Heater Coolant Control Valve.
    • PCM

  2. A1 RETRIEVE AND RECORD ALL DTCS

    • Using the diagnostic scan tool, retrieve all DTCs.

    Was DTC P2681 or P2683 set? 

    Yes  GO to  A2
    No  The issue may not be the Transmission Fluid Heater Coolant Control Valve electrical system. Refer to symptom chart.

  3. A2 CHECK BJB (BATTERY JUNCTION BOX) FUSE 22 (10A)

    • Ignition OFF.

    • Remove BJB fuse 22 (10A).

    • Check BJB fuse 22 (10A).

    Is the resistance less than 5 ohms? 

    Yes  GO to  A4
    No  GO to  A3

  4. A3 CHECK THE TRANSMISSION FLUID HEATER COOLANT CONTROL VALVE POWER CIRCUIT FOR A SHORT TO GROUND

    • Disconnect Transmission Fluid Heater Coolant Control Valve C1702.

    • Inspect for damaged or pushed-out terminals.

    • Measure.
      Positive Lead Measurement / Action Negative Lead
      C1702-1
      GFD327408Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  A5
    No  REPAIR the circuit.

  5. A4 CHECK THE TRANSMISSION FLUID HEATER COOLANT CONTROL VALVE POWER CIRCUIT FOR AN OPEN

    • Install the fuse.

    • Disconnect Transmission Fluid Heater Coolant Control Valve C1702.

    • Ignition ON.

    • Measure.
      Positive Lead Measurement / Action Negative Lead
      C1702-1
      GFD327409Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is voltage greater than 10 volts? 

    Yes  GO to  A6
    No  REPAIR the circuit.

  6. A5 CHECK THE TRANSMISSION FLUID HEATER COOLANT CONTROL VALVE CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Disconnect PCM C1232B.

    • Measure.
      Positive Lead Measurement / Action Negative Lead
      C1702-2
      GFD327408Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  A6
    No  REPAIR the circuit.

  7. A6 CHECK THE TRANSMISSION FLUID HEATER COOLANT CONTROL VALVE CONTROL CIRCUIT FOR AN OPEN

    • Disconnect PCM C1232B.

    • Measure.
      Positive Lead Measurement / Action Negative Lead
      C1702-2
      GFD327408Courtesy of FORD MOTOR COMPANY
      		 C1232B-81

    Is the resistance less than 5 ohms? 

    Yes  GO to  A7
    No  REPAIR the circuit.

  8. A7 CHECK THE TRANSMISSION FLUID HEATER COOLANT CONTROL VALVE

    NOTE: The resistance specification below is for a temperature range between -40 deg.C - 200 deg.C (-40 deg.F - 392 deg.F)

    • Measure.
      Positive Lead Measurement / Action Negative Lead
      C1702-1
      GFD327408Courtesy of FORD MOTOR COMPANY
      		 C1702-2

    Is the resistance between 15 - 25 ohms? 

    Yes  PCM Guided Routine Testing
    No  INSTALL a new Transmission Fluid Heater Coolant Control Valve. Refer to: Transmission Fluid Heater Coolant Control Valve .
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