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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 431 (Automatic Transmission - 10-Speed Automatic Transmission - 10R80 (Diagnosis & Testing - General Procedures)) >> Diagnosis And Testing >> DTC Chart and Pinpoint Tests - 3.5L EcoBoost (272kW/370PS) >> Pinpoint Tests >> Pinpoint Test B : Transmission Fluid Temperature Sensor

Pinpoint Test B : Transmission Fluid Temperature Sensor

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to TRANSMISSION CONTROLS - 10R80 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 drop 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 illuminates the wrench light in conjunction with P0712 and/or P0713. Resolve the more specific DTC first.
    PCM P0711:00 Transmission Fluid Temperature Sensor "A" Circuit Range/Performance: No Sub Type Information This DTC indicates the TFT sensor is reading within range, but the PCM detected no change when the vehicle was driven enough that the transmission fluid temperature should have changed.
    PCM P0712:00 Transmission Fluid Temperature Sensor "A" Circuit Low: No Sub Type Information This DTC indicates a short to ground in the TFT sensor circuit.
    PCM P0713:00 Transmission Fluid Temperature Sensor "A" Circuit High: No Sub Type Information This DTC indicates an open circuit in the TFT sensor circuit.

    Possible Sources 

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

  2. B1 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR INPUT SIGNAL CIRCUIT

    • Ignition OFF.

    • Disconnect Transmission Vehicle Harness C168A.

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

    • Connect the diagnostic tool.

    • Ignition ON.

    • Access the PCM and monitor the TFT (Deg C) PID

    • Access the PCM and monitor the TFT_V (V) PID

    Does the TFT PID display approximately -40°C and the TFTV PID display 4.96 to 5.10 volts? 

    Yes  GO to  B2
    No  GO to  B3

  3. B2 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL RETURN CIRCUIT

    • Connect a fused jumper to the transmission vehicle harness:
      Positive Lead Measurement / Action Negative Lead
      C168A-13
      GFD463465Courtesy of FORD MOTOR COMPANY
      		 C168A-20

    Does the TFTPID display approximately 190°C and the TFTV PID display 0 volts? 

    Yes  GO to  B8
    No  GO to  B3

  4. B3 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR INPUT SIGNAL CIRCUIT FOR VOLTAGE

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-13
      GFD463952Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage between 4.8 and 5.1 volts? 

    Yes  GO to  B6
    No  GO to  B4

  5. B4 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR INPUT SIGNAL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect PCM C175T.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-13
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 C175T-42

    Is the resistance less than 3 ohms? 

    Yes  GO to  B5
    No  REPAIR the circuit.

  6. B5 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR INPUT SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-13
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  Refer to PCM Guided Routine Testing . After programming the new module, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .
    No  REPAIR the circuit.

  7. B6 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL RETURN CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect PCM C175T.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-20
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 C175T-7

    Is the resistance less than 3 ohms? 

    Yes  GO to  B7
    No  REPAIR the circuit.

  8. B7 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL RETURN CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-20
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  Refer to PCM Guided Routine Testing . After programming the new module, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .
    No  REPAIR the circuit.

  9. B8 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR FOR AN OPEN AT THE TRANSMISSION BULKHEAD CONNECTOR

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      GFD463947Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 13
      GFD463953Courtesy of FORD MOTOR COMPANY
      GFD463947Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 20

    • Compare the measured resistance to the current temperature of the transmission fluid using the following chart.
      °C  °F  Resistance (ohms) 
      -50 to -40 -58 to -40 41k-97k
      -39 to -20 -39 to -4 14k-52k
      -19 to -1 -3 to 31 5.5k-17k
      0 to 20 32 to 68 2.3k-6.4k
      21 to 40 69 to 104 1.1k-2.7k
      41 to 70 105 to 158 0.4k-1.3k
      71 to 90 159-194 236-445
      91 to 110 195-230 140-247
      111 to 130 231-266 87-145
      131 to 150 267-302 55-90

    Does the resistance match the specification on the temperature chart? 

    Yes  GO to  B10
    No  GO to  B9

  10. B9 CHECK TFT SENSOR RESISTANCE

    • Disconnect TFT sensor C1842.

    • Measure and record the resistance of the TFT sensor.

    • Compare the measured resistance to the current temperature of the TFT sensor using the following chart.
      °C  °F  Resistance (ohms) 
      -50 to -40 -58 to -40 41k-97k
      -39 to -20 -39 to -4 14k-52k
      -19 to -1 -3 to 31 5.5k-17k
      0 to 20 32 to 68 2.3k-6.4k
      21 to 40 69 to 104 1.1k-2.7k
      41 to 70 105 to 158 0.4k-1.3k
      71 to 90 159-194 236-445
      91 to 110 195-230 140-247
      111 to 130 231-266 87-145
      131 to 150 267-302 55-90

    Does the resistance match the specification on the temperature chart? 

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

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

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      GFD463947Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 13
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground
      GFD463947Courtesy of FORD MOTOR COMPANY

      Transmission component side, pin 20
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  B12
    No  GO to  B11

  12. B11 CHECK THE TFT SENSOR FOR A SHORT TO GROUND

    • Disconnect TFT sensor C1842.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      TFT sensor component side pin 1
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground
      TFT sensor component side pin 2
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

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

  13. B12 CHECK THE RESISTANCE OF THE ENTIRE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR CIRCUIT

    • Disconnect PCM C175T.

    • Connect Transmission vehicle harness C168A.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175T-42
      GFD463953Courtesy of FORD MOTOR COMPANY
      		 C175T-7

    • Compare the measured resistance to the current temperature of the transmission fluid using the following chart.
      °C  °F  Resistance (ohms) 
      -50 to -40 -58 to -40 41k-97k
      -39 to -20 -39 to -4 14k-52k
      -19 to -1 -3 to 31 5.5k-17k
      0 to 20 32 to 68 2.3k-6.4k
      21 to 40 69 to 104 1.1k-2.7k
      41 to 70 105 to 158 0.4k-1.3k
      71 to 90 159-194 236-445
      91 to 110 195-230 140-247
      111 to 130 231-266 87-145
      131 to 150 267-302 55-90

    Does the resistance match the specification on the temperature chart? 

    Yes  CONNECT all electrical connectors. CLEAR the DTC. CARRY OUT the KOEO and KOER self-tests. If the DTC returns, Refer to PCM Guided Routine Testing . After programming the new module, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download . If the DTC does not return, the fault is no longer present and might have been caused by a terminal fitment issue.
    No  There is a terminal fitment issue. REPAIR the vehicle wiring harness.
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