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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Engine Controls - Pinpoint Tests - (Hybrid)) >> TA: Transmission Range (TR) Sensor >> Test Procedures

Test Procedures

WARNING: This page is about a different variant/trim than selected.
  1. TA1 VERIFY THAT THE HARD FAULT IS PRESENT 
    • Carry out the PCM On Demand Self-test.

    Are any of the following DTCs present during the PCM self-test: P2800, P2801, P2802, P2803, P2805, or 2806? 

    Yes No
    A hard fault is present.
    GO to  TA2.    		 GO to  TA26.
  2. TA2 CHECK THE TRANSMISSION RANGE (TR) SENSOR FOR PROPER MECHANICAL CONNECTION 
    NOTE: Verify that gear selector is not stuck between the gears.
    • Key in ON position.
    • Move the gear selector from PARK to REVERSE, NEUTRAL, DRIVE and LOW gears.
    • Observe the instrument cluster PRNDL display.

    Does the PRNDL indicate PARK in all gear selector positions? 

    Yes No
    Key in OFF position. INSTALL a new TR sensor. GO to  TA3.
  3. TA3 CHECK THE FUNCTIONALITY OF THE TRANSMISSION RANGE (TR) SENSOR 
    • Access the PCM and monitor the TR_A1, TR_A2 and TR_A3 PIDs.
    • Record the TR-A1, TR-A2 and TR-A3 voltage values in PARK, REVERSE, NEUTRAL, DRIVE and LOW gears.
    • Compare the recorded voltages to the voltages in the table below.
    TR SENSOR PARK REVERSE NEUTRAL DRIVE LOW
    TR-A1 (VOLTS) 4.25 - 4.80 2.95 - 3.50 2.30 - 2.85 1.60-2.15 0.90-1.45
    TR-A2 (VOLTS) 0.50-1.10 1.75-2.25 2.35 - 2.80 3.25 - 3.75 3.40 - 4.00
    TR-A3 (VOLTS) 0.25 - 0.75 1.40-1.90 2.00 - 2.55 2.65-3.15 3.25 - 3.80

    Are all 3 TR-A signals in range in each gear? 

    Yes No
    Key in OFF position.
    GO to  TA24.    		 Key in OFF position.
    GO to  TA4.
  4. TA4 CHECK THE VREF VOLTAGE TO THE TR SENSOR 
    • TR Sensor connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
    ( + ) TR Sensor Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-VREF1 - Pin 7 TR-RTN1 - Pin 3
    TR-VREF2 - Pin 6 TR-RTN2 - Pin 1

    Are the voltages between 4.5 V - 5.5 V? 

    Yes No
    GO to  TA5 For VREF voltage above 5.5 volts:
    GO to  TA27
    For VREF voltage below 4.5 volts:
    GO to  TA29
  5. TA5 CHECK THE FUNCTIONALITY OF THE TR-A1 CIRCUIT 
    NOTE: Use the voltage measurements recorded in Pinpoint Test Step TA3.

    Is TR-A1 out of range in any gear? 

    Yes No
    GO to  TA8 GO to  TA6
  6. TA6 CHECK THE FUNCTIONALITY OF THE TR-A2 CIRCUIT 
    NOTE: Use the voltage measurements recorded in Pinpoint Test Step TA3.

    Is TR-A2 out of range in any gear? 

    Yes No
    GO to  TA13 GO to  TA7
  7. TA7 CHECK THE FUNCTIONALITY OF THE TR-A3 CIRCUIT 
    NOTE: Use the voltage measurements recorded in Pinpoint Test Step TA3.

    Is TR-A3 out of range in any gear? 

    Yes No
    GO to  TA18 GO to  TA26
  8. TA8 CHECK THE TR-A1 CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • TR Sensor connector disconnected.
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A1 -PinT16 TR-A1 - Pin 8

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  TA9 REPAIR the open circuit.
  9. TA9 CHECK THE TR-A1 CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Key in ON position.
    • Measure the voltage between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A1 - PinT16 Negative terminal

    Is the voltage less than 1 V? 

    Yes No
    Key in OFF position.
    GO to  TA10    		 Key in OFF position. REPAIR the short circuit to PWR.
  10. TA10 CHECK THE TR-A1 CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A1 - PinT16 Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  TA11 REPAIR the short circuit to GND.
  11. TA11 CHECK FOR THE TR-A1 CIRCUIT SHORTED TO SIGNALS IN THE SAME HARNESS 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A1 - Pin 8 TR-A2 - Pin 5
    TR-A1 - Pin 8 TR-A3 - Pin 2
    TR-A1 - Pin 8 TR-VREF1 - Pin 7
    TR-A1 - Pin 8 TR-VREF2 - Pin 6
    TR-A1 - Pin 8 TR-RTN1 - Pin 3
    TR-A1 - Pin 8 TR-RTN2 - Pin 1

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA12 REPAIR the short circuit.
  12. TA12 CHECK THE FUNCTIONALITY OF THE TR SENSOR 
    • Gear selector lever in PARK.
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Component Side ( - ) TR Sensor Connector, Component Side
    TR-VREF1 - Pin 7 TR-A1 - Pin 8

    Is the resistance between 900 ohms -1K ohms? 

    Yes No
    GO to  TA23 INSTALL a new TR sensor.
  13. TA13 CHECK THE TR-A2 CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • TR Sensor connector disconnected.
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A2 - Pin T28 TR-A2 - Pin 5

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  TA14 REPAIR the open circuit.
  14. TA14 CHECK THE TR-A2 CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Key in ON position.
    • Measure the voltage between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A2 - Pin T28 Negative terminal

    Is the voltage less than 1 V? 

    Yes No
    Key in OFF position.
    GO to  TA15    		 Key in OFF position. REPAIR the short circuit to PWR.
  15. TA15 CHECK THE TR-A2 CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A2 - Pin T28 Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  TA16 REPAIR the short circuit to GND.
  16. TA16 CHECK FOR THE TR-A2 CIRCUIT SHORTED TO SIGNALS IN THE SAME HARNESS 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A2 - Pin 5 TR-A1 - Pin 8
    TR-A2 - Pin 5 TR-A3 - Pin 2
    TR-A2 - Pin 5 TR-VREF1 - Pin 7
    TR-A2 - Pin 5 TR-VREF2 - Pin 6
    TR-A2 - Pin 5 TR-RTN1 - Pin 3
    TR-A2 - Pin 5 TR-RTN2 - Pin 1

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA17 REPAIR the short circuit.
  17. TA17 CHECK THE FUNCTIONALITY OF THE TR SENSOR 
    • Gear selector lever in PARK.
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Component Side ( - ) TR Sensor Connector, Component Side
    TR-VREF1 - Pin 7 TR-A2 - Pin 5

    Is the resistance between 3K ohms - 3.5K ohms? 

    Yes No
    GO to  TA23 INSTALL a new TR sensor.
  18. TA18 CHECK THE TR-A3 CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • TR Sensor connector disconnected.
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A3 - Pin T39 TR-A3 - Pin 2

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  TA19 REPAIR the open circuit.
  19. TA19 CHECK THE TR-A3 CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Key in ON position.
    • Measure the voltage between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A3 - Pin T39 Negative terminal

    Is the voltage less than 1 V? 

    Yes No
    Key in OFF position.
    GO to  TA20    		 Key in OFF position. REPAIR the short circuit to PWR.
  20. TA20 CHECK THE TR-A3 CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
    TR-A3 - Pin T39 Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  TA21 REPAIR the short circuit to GND.
  21. TA21 CHECK FOR THE TR-A3 CIRCUIT SHORTED TO SIGNALS IN THE SAME HARNESS 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A3 - Pin 2 TR-A1 - Pin 8
    TR-A3 - Pin 2 TR-A2 - Pin 5
    TR-A3 - Pin 2 TR-VREF1 - Pin 7
    TR-A3 - Pin 2 TR-VREF2 - Pin 6
    TR-A3 - Pin 2 TR-RTN1 - Pin 3
    TR-A3 - Pin 2 TR-RTN2 - Pin 1

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA22 REPAIR the short circuit.
  22. TA22 CHECK THE FUNCTIONALITY OF THE TR SENSOR 
    • Gear selector lever in Park.
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Component Side ( - ) TR Sensor Connector, Component Side
    TR-VREF1 - Pin 7 TR-A3-Pin 2

    Is the resistance between 3K ohms - 3.5K ohms? 

    Yes No
    GO to  TA23 INSTALL a new TR sensor.
  23. TA23 CHECK THE TR SENSOR CIRCUIT INTEGRITY 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Component Side ( - ) TR Sensor Connector, Component Side
    TR-VREF1 - Pin 7 TR-RTN1 - Pin 3

    Is the resistance between 1K ohms - 1.5K ohms? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . INSTALL a new TR sensor.
  24. TA24 CHECK FOR TR-A SIGNALS SHORTED TO EACH OTHER IN THE HARNESS 
    • PCM connector disconnected.
    • TR Sensor connector disconnected.
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) TR Sensor Connector, Harness Side
    TR-A1 - Pin 8 TR-A2 - Pin 5
    TR-A1 - Pin 8 TR-A3 - Pin 2
    TR-A2 - Pin 5 TR-A3 - Pin 2

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA25 REPAIR the short circuit.
  25. TA25 CHECK THE TR SENSOR CIRCUIT INTEGRITY 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Component Side ( - ) TR Sensor Connector, Component Side
    TR-VREF1 - Pin 7 TR-RTN1 - Pin 3

    Is the resistance between 1K ohms - 1.5K ohms? 

    Yes No
    GO to  TA26 INSTALL a new TR sensor.
  26. TA26 CHECK THE TR SENSOR CIRCUIT FOR AN INTERMITTENT CONCERN 
    • PCM connector connected.
    • TR Sensor connector connected.
    • Key in ON position.
    • Access the PCM and monitor the TR_A1, TR_A2 and TR_A3 PIDs.
    • Wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM. Monitor the TR-A1, TR-A2, and TR-A3 PIDs. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.

    Is a concern present during the wiggle test? 

    Yes No
    Key in OFF position.
    REPAIR as necessary.    		 Key in OFF position.
    Unable to duplicate or identify the fault at this time.
    GO to  Z1.
  27. TA27 CHECK THE TR-VREF1 AND TR-VREF2 CIRCUITS FOR A SHORT TO VPWR 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) PCM Connector, Harness Side
    TR-VREF1 -PinT15 VPWR - Pin B35, B36
    TR-VREF2 - Pin T27 VPWR - Pin B35, B36

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA28 REPAIR the short circuit to PWR.
  28. TA28 CHECK THE TR-VREF1 AND TR-VREF2 CIRCUITS FOR A SHORT TO PWR 
    • Key in ON position.
    • Measure the voltage between:
    ( + ) TR Sensor Connector, Harness Side ( - )
    TR-VREF1 - Pin 7 Ground
    TR-VREF2 - Pin 6 Ground

    Are the voltages greater than 10.5 V? 

    Yes No
    REPAIR the short circuit to PWR. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
  29. TA29 CHECK THE TR-VREF1 AND TR-VREF2 CIRCUITS FOR A SHORT TO GND 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - )
    TR-VREF1-Pin 7 Ground
    TR-VREF2-Pin6 Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  TA30 REPAIR the short circuit to GND.
  30. TA30 CHECK THE TR-VREF1 AND TR-VREF2 CIRCUITS FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) PCM Connector, Harness Side
    TR-VREF1 - Pin 7 TR-VREF1 -PinT15
    TR-VREF2 - Pin 6 TR-VREF2 - Pin T27

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  TA31 REPAIR the open circuit.
  31. TA31 CHECK THE TR-RTN1 AND TR-RTN2 CIRCUITS FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + ) TR Sensor Connector, Harness Side ( - ) PCM Connector, Harness Side
    TR-RTN1 - Pin 3 TR-RTN1 - PinT17
    TR-RTN2 - Pin 1 TR-RTN2 - Pin T29

    Are the resistances less than 5 ohms? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . REPAIR the open circuit.
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