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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 267 (Automatic Transmission, Transfer Case And Power Transfer Unit - 6-Speed Automatic Transmission - 6R140 (1 Of 2)) >> Diagnosis And Testing >> Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 6.2L V8 >> Pinpoint Tests >> Pinpoint Test B : TFT (Transmission Fluid Temperature) Sensor

Pinpoint Test B : TFT (Transmission Fluid Temperature) Sensor

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. Transmission Controls - TorqShift 6 for schematic and connector information.

    Normal Operation and Fault Conditions 

    The TFT sensor is a temperature dependent resistor that is in contact with transmission fluid in the transmission sump area. The PCM monitors the voltage across the TFT sensor, which changes as transmission fluid temperature varies. The PCM uses the TFT sensor signal as an input for its strategy for shifting and TCC operation. The PCM also uses the TFT sensor signal for transmission fault detection and diagnostics.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0710:00 Transmission Fluid Temperature Sensor "A" Circuit: No Sub Type Information This DTC sets relationally if the DTCs P0712 or P0713 are set, resolve these DTCs first.
    PCM P0711:00 Transmission Fluid Temperature Sensor "A" Circuit Range/Performance: No Sub Type Information This DTC sets if the TFT sensor is stuck (failed to change by at least 8 degrees F) when the vehicle was driven enough that TFT should have changed.
    PCM P0712:00 Transmission Fluid Temperature Sensor "A" Circuit Low: No Sub Type Information This DTC sets if the PCM detects a short to ground in the TFT sensor circuitry.
    PCM P0713:00 Transmission Fluid Temperature Sensor "A" Circuit High: No Sub Type Information This DTC sets if the PCM detects an open in the TFT sensor circuitry.

    Possible Sources 

    • Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
    • TFT sensor
    • Transmission internal wiring harness
    • PCM fault

  2. B1 CHECK TFT INPUT SIGNAL

    • Ignition OFF.

    • Disconnect Transmission Vehicle Harness C1623.

    • Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

    • Connect the diagnostic tool.

    • Ignition ON.

    • Enter the following mode on the diagnostic scan tool: TFTPIDs TFT and TFTV.

    Does the TFTPID display -40 deg. C (-40 deg. F) and the TFTV PID display 4.96 to 5.10 volts? 

    Yes  GO to  B2
    No  GO to  B3

  3. B2 CHECK THE TFT SIGNAL RETURN CIRCUIT

    • Connect a fused jumper:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1623-18
      GFD408301Courtesy of FORD MOTOR COMPANY
      		 Refer to C1623-19

    Does the TFTPID display approximately 190 deg.-195 deg. C (374 deg.-383 deg. F) and the TFTV PID display approximately 0 volts? 

    Yes  Remove the fused jumper. GO to  B7
    No  Remove the fused jumper. GO to  B3

  4. B3 CHECK THE TFT SIGNAL INPUT CIRCUIT FOR VOLTAGE

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1623-18
      GFD408299Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage between 4.96 and 5.10 volts? 

    Yes  GO to  B6
    No  GO to  B4

  5. B4 CHECK THE TFT SIGNAL INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect TCM C1750.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1623-18
      GFD408300Courtesy of FORD MOTOR COMPANY
      		 Refer to C1750-24

    Is the resistance less than 3 ohms? 

    Yes  GO to  B5
    No  REPAIR the circuit.

  6. B5 CHECK THE TFT SIGNAL INPUT CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1623-18
      GFD408300Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  Refer to PCM GUIDED ROUTINE TESTING After installing a new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .
    No  REPAIR the circuit.

  7. B6 CHECK THE TFT SIGNAL RETURN CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect TCM C1750.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1623-19
      GFD408300Courtesy of FORD MOTOR COMPANY
      		 Refer to C1750-49

    Is the resistance less than 3 ohms? 

    Yes  Refer to PCM GUIDED ROUTINE TESTING After installing a new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .
    No  REPAIR the circuit.

  8. B7 CHECK TFT SENSOR RESISTANCE

    • Measure and record the resistance of the TFT sensor at the transmission bulkhead connector:
      Positive Lead Measurement / Action Negative Lead
      GFD408729Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 18
      GFD408300Courtesy of FORD MOTOR COMPANY
      GFD408729Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 19

    • Compare the measured resistance to the current temperature of the transmission fluid using following temperature chart:
      deg. C deg. F Resistance (Ohms)
      -40 to -20 -40 to -4 967K-284K
      -19 to -1 -3 to 31 284K-100K
      0-20 32-68 100K-37K
      21-40 69-104 37K-16K
      41-70 105-158 16K-5K
      71-90 159-194 5K-2.7K
      91-110 195-230 2.7K-1.5K
      111-130 231-266 1.5K-0.8K
      131-150 267-302 0.8K-0.54K

    Does the measured resistance match the temperature chart? 

    Yes  GO to  B9
    No  GO to  B8

  9. B8 CHECK THE TFT SENSOR RESISTANCE

    • Disconnect TFT sensor connector.

    • Measure and record the resistance of the TFT sensor.

    • Compare the measured resistance to the current temperature of the TFT sensor using the following temperature chart:
      deg. C deg. F Resistance (Ohms)
      -40 to -20 -40 to -4 967K-284K
      -19 to -1 -3 to 31 284K-100K
      0-20 32-68 100K-37K
      21-40 69-104 37K-16K
      41-70 105-158 16K-5K
      71-90 159-194 5K-2.7K
      91-110 195-230 2.7K-1.5K
      111-130 231-266 1.5K-0.8K
      131-150 267-302 0.8K-0.54K

    Does the measured resistance match the temperature chart? 

    Yes  INSTALL a new transmission internal wiring harness. REFER to: Transmission Internal Wiring Harness .
    No  INSTALL a new TFT sensor. REFER to: Transmission Fluid Temperature (TFT) Sensor .

  10. B9 CHECK THE TRANSMISSION INTERNAL WIRING HARNESS FOR A SHORT TO GROUND

    • Measure and record the resistance between the TFT sensor circuit and ground at the transmission bulkhead connector:
      Positive Lead Measurement / Action Negative Lead
      GFD408729Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 18
      GFD408300Courtesy of FORD MOTOR COMPANY
      		 Ground
      GFD408729Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 19
      GFD408300Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are both resistances greater than 10, 000 ohms? 

    Yes  The TFT sensor is operating properly at this time. To diagnose an overheating concern, REFER to: Transmission Cooling .
    No  GO to  B10

  11. B10 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR FOR A SHORT TO GROUND

    • Disconnect TFT sensor connector.

    • Measure and record the resistance between each pin of the TFT sensor and ground.

    Are both resistances greater than 10, 000 ohms? 

    Yes  INSTALL a new transmission internal wiring harness. REFER to: Transmission Internal Wiring Harness .
    No  INSTALL a new TFT sensor. REFER to: Transmission Fluid Temperature (TFT) Sensor .
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