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Pinpoint Test C: Transmission Range (TR) Position Sensor

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the TRANSMISSION VEHICLE HARNESS CONNECTOR  illustration preceding these pinpoint tests.
NOTE: Refer to the TRANSMISSION INTERNAL HARNESS CONNECTOR  illustration preceding these pinpoint tests.
NOTE: Read and record all DTCs.
NOTE: Use the PID Chart for available diagnostic PIDs. Refer to OUTPUT STATE CONTROL (OSC) MODE .

TEST STEP 

  1. C1 VERIFY THE DIAGNOSTIC TROUBLE CODES 
    • Key in OFF position.
    • Select PARK.
    • Carry out On-Board Diagnostic Test.
    • ARE ONLY TR POSITION DTC CODES PRESENT? 

    RESULT/ACTION TO TAKE 

    1. YES  GO to  C3.
    2. NO  GO to C2.
  2. C2 VERIFY THE SHIFT CABLE/LINKAGE ADJUSTMENT 
    1. YES  GO to C3.
    2. NO  ADJUST the shift cable/linkage. REFER to TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS . GO to C3.
  3. C3 CHECK THE ELECTRICAL SYSTEM OPERATION (START AND REVERSE) 
    • Select PARK.
    • Key in START position.
    • Key in OFF position.
    • Select NEUTRAL.
    • Key in START position.
    • Select PARK.
    • Key in OFF position.
    • Select REVERSE.
    • Key in ON position.
    • Check the reverse lamp illumination.
    • DOES THE ENGINE CRANK IN PARK AND NEUTRAL? 

      DO THE REVERSE LAMPS ILLUMINATE? 

    1. YES  The problem is not in the TR position. REFER to STARTERS - DIESEL . REFER to the appropriate INTRODUCTION article for further diagnosis of the PCM, starting system and reverse lamps.
    2. NO  GO to C4.
  4. C4 CHECK THE ELECTRICAL SYSTEM OPERATION (TR POSITION AND PCM) 
    • Select PARK.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Diagnostic Mode.
    • Enter the following diagnostic mode on the diagnostic tool: TR_DC and TR_FREQ.
    • Move transmission range selector lever into each gear and stop.
    • Observe the PIDs: TR_DC, and TR_FREQ.
    • Monitor PID: TR_FREQ.
    • Compare the PID: TR_DC to the TR Position Duty Cycle Chart.

      TR_DC DUTY CYCLE CHART 

      TR_DC DUTY CYCLE CHART

      Position Min % Duty Cycle Max % Duty Cycle
      P 7.13 23.76
      R 23.77 38.48
      N 38.49 48.55
      D 48.56 58.82
      3 58.83 68.08
      2 68.09 77.96
      1 77.97 90.34
    • IS THE PID: TR_FREQ IN THE RANGE OF 100 TO 150 HZ? 

      Is the PID: TR_DC in the TR position Duty Cycle range? 

      DOES PID: TR_DC REMAIN STEADY WHEN THE HARNESS IS WIGGLED, THE SENSOR IS TAPPED, OR THE VEHICLE IS DRIVEN? 

    1. YES  The problem is not in the digital TR sensor system. REFER to DIAGNOSIS BY SYMPTOM  for additional diagnosis.
    2. NO  If TR_DC changes when wiggling the harness, tapping on the sensor or driving the vehicle, the problem may be intermittent.

      GO to C5.

  5. C5 CHECK THE PCM HARNESS CIRCUITS FOR OPENS 
    • Key in OFF position.
    • Disconnect: PCM Connector B.
    • Disconnect: Transmission Bulkhead Connector.
    • Measure the resistance between pin 15 of the transmission bulkhead connector harness side and pin 25 of the PCM connector B harness side.
    • Measure the resistance between pin 17 of the transmission bulkhead connector harness side and pin 22 of the PCM connector B harness side.
    • Measure the resistance between pin 21 of the transmission bulkhead connector harness side and pin 1 of the PCM connector B harness side.
    • ARE THE RESISTANCES LESS THAN 5 OHMS? 
    1. YES  GO to C6.
    2. NO  REPAIR the circuits. CLEAR DTCs and REPEAT Quick Tests.
  6. C6 CHECK THE PCM HARNESS CIRCUIT FOR A SHORT TO GROUND OR POWER 
    • Measure the resistance between pin 15 of the transmission bulkhead connector harness side and pin 1 of the PCM connector B harness side.
    • Measure the resistance between pin 17 of the transmission bulkhead connector harness side and pin 1 of the PCM connector B harness side.
    • Measure the resistance between pin 15 of the transmission bulkhead connector harness side and pin 22 of the PCM connector B harness side.
    • Measure the resistance between pin 1 of the transmission bulkhead connector harness side and pin 22 of the PCM connector B harness side.
    • ARE THE RESISTANCES GREATER THAN 10,000 OHMS? 
    1. YES  GO to C7.
    2. NO  REPAIR the circuits. TEST the system for normal operation.
  7. C7 CHECK THE INTERNAL HARNESS FOR AN OPEN 
    • Drain the transmission fluid
    • Remove the transmission fluid pan.
    • Remove the transmission fluid filter.
    • Connect the diagnostic tool.
    • Measure the resistance between pin 21 transmission bulkhead connector and pin 1 on the sensor.
    • Measure the resistance between pin 15 transmission bulkhead connector and pin 2 on the sensor.
    • Measure the resistance between pin 17 transmission bulkhead connector and pin 3 on the sensor and ground.
    • ARE THE RESISTANCES GREATER THAN 0.5 OHMS? 
    1. YES  INSTALL a new internal harness.
    2. NO  GO to C8.
  8. C8 CHECK THE NON-PCM INTERNAL CIRCUITS OF THE SENSOR 
    • Measure the resistance between pins 1, 22 and 25 and ground.
    • ARE THE RESISTANCES GREATER THAN 10,000 OHMS? 
    1. YES  INSTALL a new internal harness.
    2. NO  INSTALL a new TR position sensor assembly. REFER to DIGITAL TRANSMISSION RANGE (TR) SENSOR . CLEAR DTCs and RERUN OBD Tests.
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