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Home >> Ford >> 2011 >> Escape Base, 2.5 7, AWD, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission (6F35) (Except Hybrid)) >> Diagnosis And Testing >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test B: TFT Sensor

Pinpoint Test B: TFT Sensor

WARNING: This page is about a different variant/trim than selected.
NOTE: Refer to the SOLENOID BODY LEADFRAME TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR PIN  illustration within the Transaxle Connector Layouts procedure  in this service information.
  1. B1 ELECTRONIC DIAGNOSTICS 
    • Check to make sure the transaxle vehicle harness C168A is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
    • Have the above items been checked? 
    1. Yes:  Go to B2  .
    2. No:  Carry out checks. ERASE the codes. REPEAT the self-test.
  2. B2 CHECK THE TFT SENSOR CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: Transaxle Vehicle Harness C168A.
    • Disconnect: PCM Transaxle Harness C175T.
    • Use a mirror to inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
    • Measure the resistance between PCM transaxle harness C175T-19, circuit VET27 (BN/YE) and transaxle vehicle harness C168A-2 circuit VET27 (BN/YE).
      Fig 1: Measuring Resistance Between PCM Transaxle Harness C175T-19, Circuit VET27 (BN/YE) And Transaxle Vehicle Harness C168A-2 Circuit VET27 (BN/YE)
      G07443767Courtesy of FORD MOTOR CO.
    • Measure the resistance between PCM transaxle harness C175T-41, circuit RE406 (GY/VT) and transaxle vehicle harness C168A-1, circuit RE406 (GY/VT).
      Fig 2: Measuring Resistance Between PCM Transaxle Harness C175T-41, Circuit RE406 (GY/VT) And Transaxle Vehicle Harness C168A-1, Circuit RE406 (GY/VT)
      G07443768Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes:  Go to B3  .
    2. No:  REPAIR the circuit(s) for an open. CONNECT all components. TEST the system for normal operation.
  3. B3 CHECK THE TFT SENSOR CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: Catalyst Monitor Sensor (CMS) C141.
    • Disconnect: CMS C142.
    • Measure the resistance between transaxle vehicle harness C168A-2, circuit VET27 (BN/YE) and ground.
      Fig 3: Measuring Resistance Between Transaxle Vehicle Harness C168A-2, Circuit VET27 (BN/YE) And Ground
      G07443769Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle vehicle harness C168A-1, circuit RE406 (GY/VT) and ground.
      Fig 4: Measuring Resistance Between Transaxle Vehicle Harness C168A-1, Circuit RE406 (GY/VT) And Ground
      G07443770Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    1. Yes:  Go to B4  .
    2. No:  REPAIR the circuit(s) for a short to ground. CONNECT all components. TEST the system for normal operation.
  4. B4 CHECK THE TFT CIRCUITS FOR A SHORT TO VPWR 
    • Measure the voltage between transaxle vehicle harness C168A-2, circuit VET27 (BN/YE) and ground.
      Fig 5: Measuring Voltage Between Transaxle Vehicle Harness C168A-2, Circuit VET27 (BN/YE) And Ground
      G07443771Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle vehicle harness C168A-1, circuit RE406 (GY/VT) and ground.
      Fig 6: Measuring Voltage Between Transaxle Vehicle Harness C168A-1, Circuit RE406 (GY/VT) And Ground
      G07443772Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes:  REPAIR the circuit(s) for a short to voltage. CONNECT all components. TEST the system for normal operation.
    2. No:  Go to B5  .
  5. B5 CHECK THE RESISTANCE OF THE TFT SENSORS/HARNESS 
    • Vehicle must be at normal operating temperature.
    • Connect: Transaxle Vehicle Harness C168A.
    • TEST 1  .
    • Measure and record the resistance between PCM transaxle harness C175T-19, circuit VET27 (BN/YE) and C175T-41, circuit RE406 (GY/VT).
      Fig 7: Measuring And Record Resistance Between PCM Transaxle Harness C175T-19, Circuit VET27 (BN/YE) And C175T-41, Circuit RE406 (GY/VT)
      G07443773Courtesy of FORD MOTOR CO.
    • Compare the resistance value to the following table ranges:
      TRANSMISSION FLUID TEMPERATURE (TFT)

      °C °F Resistance (Ohms)
      -40 to -20 -40 to -4 1076K-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
    • TEST 2  .
    • Check for intermittent short or open.
    • If the resistance was between 0.8K and 100K ohms carry out the following test. If the transaxle is warm, allow it to cool. Check the TFT  sensor resistance again. Compare the resistance with the initial resistance. The resistance should decrease if the transaxle was heated and should increase if the transaxle was allowed to cool. If correct, then change in the resistance occurs, repeat On-Board Diagnostic (OBD).
    • Is the resistance in the range? 
    1. Yes:  INSTALL a new PCM. CONNECT all components. TEST the system for normal operation.
    2. No:  INSTALL a new solenoid body leadframe. Refer to SOLENOID BODY LEADFRAME  in this service information.

      RECONNECT all components. TEST the system for normal operation.

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