Pinpoint Test G: Transmission Fluid Temperature Sensor

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

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 Connector Terminals (C168-2)

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 Connector (C168-2)

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 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 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.