Pinpoint Test G: Transmission Fluid Temperature Sensor

WARNING: This page is about a different variant/trim than selected.

G1 READ AND RECORD ALL DTCS
- Connect the scan tool.
- Read and record all DTCs.
- Were DTCs P0710, P0711, P0712, P0713, P1711 and/or P1783 set?
- Yes : For DTCs P0712, P0713 and/or P0710, GO to G2.
  For DTC P0711, P1711 and/or P1783, GO to G6.
- No : GO to SYMPTOM CHART .
G2 CHECK THE TFT SENSOR SIGNAL INPUT
- Ignition OFF.
- Connect the scan tool.
- Disconnect: Transmission Vehicle Harness C168.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: TFT and TFTV PIDs.
- Does the TFT PID display a temperature of -40° C (-40° F) and the TFTV PID display 4.9 volts?
- Yes : GO to G3.
- No : REPAIR the circuit. CLEAR the DTCs.

G3 CHECK THE TFT SENSOR SIGNAL CIRCUIT

Connect a fused jumper between the transmission vehicle harness and observe the scan tool:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-2	VET27 (BN/YE)	C168-3	RE406 (GY/VT)

Fig 1: Identifying Transmission Vehicle Harness C168 Connector Terminals

Courtesy of FORD MOTOR CO.

Does the TFT PID display a temperature of 191°-198°C (376°-388°F) and the TFTV PID display 0.0 to 0.2 volts?

Yes : GO to G5.
No : GO to G4.

G4 CHECK THE TFT SENSOR SIGNAL VOLTAGE

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-2	VET27 (BN/YE)	-	Ground

Fig 2: Identifying Transmission Vehicle Harness C168 Connector Terminals

Courtesy of FORD MOTOR CO.

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, INSTALL a new PCM. REFER to ENGINE CONTROLS - ELECTRONIC ENGINE CONTROLS . PROGRAM the PCM with the latest calibration level. PERFORM the SOLENOID BODY STRATEGY DATA DOWNLOAD procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . PERFORM the SOLENOID BODY STRATEGY DRIVE CYCLE , REFER to SOLENOID BODY STRATEGY DRIVE CYCLE .

G5 CHECK THE TFT SENSOR RESISTANCE

Measure the component side resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
2	-	3	-

TRANSMISSION FLUID TEMPERATURE

°C	°F	Resistance (Ohms)
-40 to -20	-40 to -4	1, 076K-269K
-19 to -1	-3 to 31	309K-91K
0-20	32-68	104K-35K
21-40	69-104	40K-15K
41-70	105-158	17K-4.9K
71-90	159-194	5.6K-2.5K
91-110	195-230	3.0K-1.4K
111-130	231-266	1.7K-0.8K
131-150	267-302	0.97K-0.56K

Fig 3: Identifying TFT Sensor Connector Terminals

Courtesy of FORD MOTOR CO.

Does the temperature to resistance specifications match?

Yes : GO to SYMPTOM CHART to diagnose an overheating concern.
No : INSTALL a new solenoid body assembly. REFER to SOLENOID BODY ASSEMBLY . PERFORM the SOLENOID BODY STRATEGY DATA DOWNLOAD procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . PERFORM the SOLENOID BODY STRATEGY DRIVE CYCLE , REFER to SOLENOID BODY STRATEGY DRIVE CYCLE .

G6 ON DEMAND SELF TEST
- Check and make sure the transmission vehicle harness C1520A is fully seated, terminals are engaged in connector and in good condition before proceeding.
- Connect the scan tool.
- Make sure the TFT is between 1.1°C (30°F) and 104.4°C (220°F).
- Run the KOER self-test.
- Did DTC P0711, P1711 and/or P1783 set?
- Yes : For DTCs P0711 and P1711, INSTALL a new solenoid body assembly. REFER to SOLENOID BODY ASSEMBLY . PERFORM the SOLENOID BODY STRATEGY DATA DOWNLOAD procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . PERFORM the SOLENOID BODY STRATEGY DRIVE CYCLE , REFER to SOLENOID BODY STRATEGY DRIVE CYCLE . For DTC P1783, REFER to TRANSAXLE/TRANSMISSION COOLING - 6F35 .
- 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 issues.