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Home >> Ford >> 2012 >> Mustang Boss 302 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1554 (Automatic Transmission - Diagnostic Trouble Code (DTC) Charts And Pinpoint Tests - 2.7L ECOBOOST (238KW/324PS) & 3.5L DURATEC (209KW 284PS)) >> Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 3.5L Duratec (209kW 284PS) >> Pinpoint Tests >> Pinpoint Test B : TFT (Transmission Fluid Temperature) Sensor >> 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 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

  1. B1 CHECK TFT INPUT SIGNAL

    • Ignition OFF.
    • Disconnect: Transmission Vehicle Harness C1575 .
    • 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: TFT PIDs TFT and TFTV.

    Does the TFT PID display -58°C (-72°F) and the TFTV PID display 4.96 to 5.10 volts? 

    Yes  GO to  B2
    No  REPAIR the circuit.

  2. B2 CHECK TFT SIGNAL INPUT CIRCUIT FOR VOLTAGE

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1575-6
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage between 4.8 and 5.1 volts? 

    Yes  GO to  B3
    No  INSPECT and REPAIR the open circuit. If an open circuit is not found, INSTALL a new PCM, REFER to: POWERTRAIN CONTROL MODULE (PCM) . PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. Refer to: Transmission Strategy Download .

  3. B3 CHECK TFT SIGNAL RETURN CIRCUIT

    • Connect:
      Positive Lead Measurement / Action Negative Lead
      C1575-5
      GFD38977Courtesy of FORD MOTOR COMPANY
      		 C1575-6

    Does the TFT PID display 190°-195°C (374°-383°F) and the TFTV PID display 0 volts? 

    Yes  GO to  B4
    No  INSPECT and REPAIR the transmission vehicle harness signal return circuit for an open. If an open circuit is not found, INSTALL a new PCM, REFER to: POWERTRAIN CONTROL MODULE (PCM) . PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. Refer to: Transmission Strategy Download .

  4. B4 CHECK TFT SENSOR RESISTANCE

    • Measure the resistance between the transmission C1575-5 and C1575-6 , component side using the following chart:
      Positive Lead Measurement / Action Negative Lead
      Component side, pin 5
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Component side, pin 6
      C1575-5
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C1575-6
      °C °F Resistance
      -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 temperature to resistance specification match? 

    Yes  To diagnose an overheating concern REFER to: Diagnosis By Symptom .
    No  INSPECT and CLEAN the TFT sensor on the molded leadframe for metallic contamination. INSTALL a new molded leadframe if no debris was found, REFER to: Transmission Strategy Download . CLEAR the DTCs.
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