Pinpoint Test G : DTCS P0710, P0711, P0712, P0713, P1711, P1783

Refer to Transmission Controls - 6F35 for schematic and connector information.

Normal Operation and Fault Conditions

The TFT sensor is located in the solenoid body leadframe. The resistance value of the TFT sensor varies with temperature change. The PCM monitors the voltage drop across the TFT sensor to determine the temperature of the transmission fluid. When the ignition is turned to the run position, the PCM uses this initial input signal to determine whether a cold start shift schedule is necessary. The cold start shift schedule allows delayed shifts when the transmission fluid is cold. The PCM inhibits TCC operation at low transmission fluid temperatures and adjusts line pressure to temperature.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0710:00	Transmission Fluid Temperature Sensor "A" Circuit: No Sub Type Information	TFT sensor circuit shorted to ground or open.
PCM P0711:00	Transmission Fluid Temperature Sensor "A" Circuit Range/Performance: No Sub Type Information	TFT sensor indicates a valid temperature but has not changed since start up.
PCM P0712:00	Transmission Fluid Temperature Sensor "A" Circuit Low: No Sub Type Information	TFT sensor circuit short to ground.
PCM P0713:00	Transmission Fluid Temperature Sensor "A" Circuit High: No Sub Type Information	TFT sensor circuit open.
PCM P1711:00	Transmission Fluid Temperature Sensor Out Of Self Test Range: No Sub Type Information	TFT sensor indicates too hot or too cold and must indicate a normal temperature range during the KOER.
PCM P1783:00	Transmission Overtemperature Condition: No Sub Type Information	TFT sensor indicates that the transmission is approaching an overheating condition.

Possible Sources

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

G1 RETRIEVE AND RECORD ALL DTCS

Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).

Are diagnostic trouble codes (DTCs) P0710, P0711, P0712, P0713, P1711 and/or P1783 present?

Yes	For diagnostic trouble codes (DTCs) P0710, P0712 and/or P0713, GO to G2 For diagnostic trouble codes (DTCs) P0711, P1711 and/or P1783, GO to G7

No	REFER to: Diagnosis By Symptom .

G2 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL INPUT
- Ignition OFF.
- Disconnect Transmission Vehicle Harness C168A.
- Inspect the connector for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.
- Ignition ON.
- Enter the following diagnostic mode: TFT and TFTV.
Does the TFT PID display a temperature -39.9 °F (-40 °C) and the TFTV PID display 4.9 volts?

Yes GO to G3

No REPAIR the circuit.

G3 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL CIRCUIT

Connect.

Positive Lead	Measurement / Action	Negative Lead
C168A-1	Courtesy of FORD MOTOR COMPANY	C168A-2

Does the TFT PID display a temperature 375.5 °F (191 °C) and the TFTV PID display 0.0 to 0.2 volts?

Yes

GO to G6

GO to G4

G4 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR SIGNAL VOLTAGE

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage between 4.8 and 5.1 volts?

Yes

GO to G5

No	INSPECT and REPAIR the circuit. If an open circuit is not found, Refer to PCM Guided Routine Testing .

G5 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR RETURN CIRCUIT

Disconnect PCM C175E.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-1	Courtesy of FORD MOTOR COMPANY	C175E-35

Is the resistance less than 3 ohms?

Yes

GO to G6

No	REPAIR the circuit.

G6 CHECK THE TFT (TRANSMISSION FLUID TEMPERATURE) SENSOR RESISTANCE

Measure:

Positive Lead	Measurement / Action	Negative Lead
Component side resistance pin 1.	Courtesy of FORD MOTOR COMPANY	Component side resistance pin 2.

Temperature

°F (°C)	Ohms
-39.9 --4.0 °F (-40 --20 °C)	1, 076K-269K
-2.2 -30.2 °F (-19 --1 °C)	309K-91K
32.0 -68.0 °F (-20 °C)	104K-35K
69.8 -103.9 °F (21 -40 °C)	40K-15K
105.7 -157.9 °F (41 -70 °C)	17K-4.9K
159.7 -193.9 °F (71 -90 °C)	5.6K-2.5K
195.7 -229.8 °F (91 -110 °C)	3.0K-1.4K
231.6 -265.8 °F (111 -130 °C)	1.7K-0.8K
267.6 -301.8 °F (131 -150 °C)	0.97K-0.56K

Does the temperature to resistance specifications match?

Yes	To diagnosis an overheating concern, REFER to: Transmission Cooling - 2.5L Duratec (125kW/170PS) .

No	INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame .

G7 ON DEMAND SELF-TEST

Check and make sure the transmission vehicle harness C168A is fully seated, the terminals are engaged in the connector and in good condition before proceeding.

Using the diagnostic scan tool, make sure the transmission fluid temperature is between 33.8 °F (1 °C) and 219.1 °F (104 °C).

Carry out the KOER self-test.

Is DTC P0711, P1711 and/or P1783 present?

Yes	For diagnostic trouble codes (DTCs) P0711 and P1711, INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame . For DTC P1783, REFER to: Transmission Cooling - 2.5L Duratec (125kW/170PS) .

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 terminal issue.