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Pinpoint Test D: Transmission Range (Tr) Sensor

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. D1 VERIFY TRANSMISSION RANGE (TR) SENSOR ALIGNMENT 
    • Make sure the TR sensor harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
    • Verify shift linkage adjustment in the DRIVE position.
    • Key in OFF position.
    • Apply parking brake.
    • Place the transaxle range selector lever in NEUTRAL. Verify that the TR sensor is correctly adjusted.
    • Is the TR sensor correctly adjusted? 

    Yes:  GO to  D2.

    No:  ADJUST TR sensor. REFER to TRANSMISSION RANGE (TR) SENSOR . PLACE transaxle range selector in PARK. CLEAR the DTCs and RERUN the Quick Test.

  2. D2 CHECK ELECTRICAL SIGNAL OPERATION 
    CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector.
    • Disconnect: TR Sensor.
    • Use mirror to inspect both ends of the connector for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals.
    • Measure the voltage between pin 5 and pin 10 of the TR sensor harness connector.
      Fig 1: Checking Electrical Signal Operation
      G04619800Courtesy of FORD MOTOR CO.
    • Key in ON position.
    • Is the voltage between 4.75 and 5.25 volts? 

    Yes:  GO to  D3.

    No:  REFER to INTRODUCTION - GASOLINE .

  3. D3 CHECK CONTINUITY OF TR SENSOR HARNESS CIRCUITS 
    CAUTION: Do not pry on the connector. This will damage the connector and can result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector.
    • Key in OFF position.
    • Disconnect: TR Sensor.
    • Inspect for damaged or pushed-out pins, corrosion or loose wires.
    • Disconnect: PCM.
    • Measure the resistance between the PCM pin T41 and the TR sensor vehicle harness connector pin 5.
      Fig 2: Checking Continuity Of TR Sensor Harness Circuits (1 Of 2)
      G04619801Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM pin T27 and the TR sensor vehicle harness connector pin 10.
      Fig 3: Checking Continuity Of TR Sensor Harness Circuits (2 Of 2)
      G04619802Courtesy of FORD MOTOR CO.
    • Is each resistance less than 5 ohms? 

    Yes:  GO to  D4.

    No:  REPAIR open circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN Quick Test.

  4. D4 CHECK TR SENSOR CIRCUIT FOR SHORTS TO POWER AND GROUND 
    • Disconnect: PCM.
    • Disconnect: TR Sensor.
    • Measure the resistance between the PCM pin T27 and the PCM pins B35, B36, B47, B48 and B49.
      Fig 4: Checking TR Sensor Circuit For Shorts To Power & Ground (1 Of 2)
      G04619803Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM pin T27 and the PCM pin T41.
      Fig 5: Checking TR Sensor Circuit For Shorts To Power & Ground (2 Of 2)
      G04619804Courtesy of FORD MOTOR CO.
    • Is each resistance greater than 10,000 ohms? 

    Yes:  GO to  D5.

    No:  REPAIR short circuit. RECONNECT all components. CLEAR the DTCs. RERUN Quick Test.

  5. D5 CHECK TRANSMISSION RANGE (TR) SENSOR RESISTANCE 
    • Disconnect: TR Sensor.
    • Install the transmission tester.
    • Connect MLP-D cable to TR sensor and Transmission Tester.
    • Install appropriate overlay into the transmission tester.
    • Measure the resistance between TR and SRTN of the TR Sensor. Verify the sensor resistance values in all gear positions. Refer to TR SENSOR RESISTANCE TABLE .
      TR SENSOR RESISTANCE TABLE

      Range Selector Position Resistance (Ohms) Volts
      P 3770 - 4607 4.41
      R 1304 - 1593 3.60
      N 660 - 807 2.93
      (D) 361 - 442 2.09
      2 190 - 232 1.37
      1 78-95 0.68
    • Are all resistance values within specification? 

    Yes:  INSTALL a new the PCM. CLEAR the DTCs, RERUN Quick Test, then GO to  D6.

    No:  INSTALL a new TR Sensor and ADJUST. REFER to TRANSMISSION RANGE (TR) SENSOR . CLEAR the DTCs and RERUN Quick Tests.

  6. D6 CHECK PARK/NEUTRAL CIRCUITS OF SENSOR 
    • Carry out the procedures outlined on the transmission tester overlay to verify the sensor PARK/NEUTRAL circuits in all gear positions.
    • Monitor the status lamp on the tester for correct indications.
    • Do the PARK/NEUTRAL circuits operate correctly and only in the correct gear position? 

    Yes:  If diagnosing a PARK/NEUTRAL circuit or starting system concern, REFER to ENGINE - 2.3L or ENGINE - 3.0L (4V) .

    No:  INSTALL a new TR sensor and ADJUST. REFER to TRANSMISSION RANGE (TR) SENSOR . CLEAR the DTCs and RERUN Quick Tests.

  7. D7 CHECK REVERSE/BACKUP LAMP CIRCUITS OF SENSOR 
    • Carry out the procedures outlined on the tester overlay to verify the sensor REVERSE/BACKUP circuits in all gear positions.
    • Monitor the status lamp on the tester for correct indications.
    • Do the REVERSE/BACKUP circuits operate correctly and only in the correct gear position? 

    Yes:  If diagnosing a REVERSE/BACKUP circuit concern, REFER to EXTERIOR LIGHTING .

    No:  INSTALL a new TR sensor and ADJUST. REFER to TRANSMISSION RANGE (TR) SENSOR . CLEAR the DTCs and RERUN Quick Tests.

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