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Pinpoint Test D: Tr Sensor

WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the transaxle connector illustrations and solenoid body leadframe internal wiring diagram TRANSAXLE CONNECTOR LAYOUTS .
NOTE: Transmission Range (TR) codes may be a result of a bad common power and ground shared between the TR  sensor, Output Shaft Speed (OSS) sensor and Turbine Shaft Speed (TSS) sensor.
  1. D1 VERIFY DTCs 
    • Ignition OFF.
    • Select PARK.
    • Start the engine.
    • Carry out the On-Board Diagnostic (OBD) Test. DTCs P0706, P0707 and P0708 cannot be set by an incorrectly adjusted selector lever cable.
    • Are only TR DTC codes present? 
    • Yes  : GO to  D3.
    • No  : GO to D2  .
  2. D2 VERIFY SELECTOR LEVER CABLE/LINKAGE ADJUSTMENT 
    • Disconnect the selector lever cable end from the manual control lever and release the lock tab.
    • Place the transaxle manual control lever in the D position.
    • Place the selector lever in the D position.
    • Reconnect the selector lever cable/linkage and lock the selector lever cable end lock tab.
    • Verify that the selector lever cable/linkage is correctly adjusted. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - AISIN AW21/6F35 .
    • Is the selector lever cable/linkage correctly adjusted? 
  3. D3 CHECK THE ELECTRICAL SIGNAL OPERATION 
    • Select PARK.
    • Disconnect: PCM Transaxle C175T.
    • Disconnect: Transaxle Vehicle Harness C168a.
    • Use a mirror to inspect both ends of the connectors for damaged or pushed-out pins, corrosion, loose wires and missing or damaged seals.
    • Is there damage to the connectors, pins or harness? 
    • Yes  : REPAIR as required. CLEAR DTCs and RERUN OBD  tests.
    • No  : GO to D4  .
  4. D4 CHECK ELECTRICAL SYSTEM OPERATION (TR AND PCM) 
    • Ignition OFF.
    • Connect the scan tool.
    • Connect: PCM Transaxle Harness C175T.
    • Connect: Transaxle Vehicle Harness C168a.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: TR  PIDs TR_DC and TR_FREQ.
    • Move the selector lever into each gear and stop.
    • Observe the following PIDs; TR_DC and TR_FREQ while wiggling harness or driving the vehicle.
    • Monitor PID: TR_FREQ.
    • Compare the PID: TR_DC to the TR  position Duty Cycle Chart.
      SELECTOR LEVER POSITION CHART

      Selector Lever Position Range (% Duty Cycle)
      P 8.0 - 25.8
      R 37.50 - 49.31
      N 54.54 - 62.49
      D 67.35 - 81.15
      L 81.15 - 92
    • Is PID TR_FREQ between 100 to 150 Hz? 

    Is PID TR_DC in range? 

    Do the PIDs TR_DC and TR_FREQ remain steady when the harness is wiggled or the vehicle driven? 

    • Yes  : The problem is not in the TR  sensor system. REFER to DIAGNOSIS BY SYMPTOM  for further diagnosis.
    • No  : If the PIDs change when wiggling the harness or driving the vehicle, the problem may be intermittent. GO to D5  .
  5. D5 CHECK THE TRANSAXLE VEHICLE HARNESS FOR AN OPEN 
    • Disconnect: PCM Transaxle Harness C175T.
    • Disconnect: Transaxle Vehicle Harness C168a.
    • Measure the resistance for the TR  sensor circuits between the transaxle vehicle harness C168a and the PCM transaxle harness C175T using the following chart.
      TRANSAXLE VEHICLE HARNESS CHART

      Transmission Range Sensor Circuit Transaxle Vehicle Harness PCM
      TR  Ground RET24 (BN/BU) C168a-20 C175T-36
      TR  Signal VET32 (VT) C168a-17 C175T-39
      TR  Power LE111 (VT/GN) C168a-18 C175T-1
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to D6  .
    • No  : REPAIR the circuit. CONNECT all components. TEST the system for normal operation.
  6. D6 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO GROUND 
    • Disconnect: Transaxle Vehicle Harness C168b.
    • Measure the resistance for the TR  sensor circuits between the transaxle vehicle harness C168a and ground using the following chart.
      TRANSAXLE VEHICLE HARNESS CHART

      Transmission Range Sensor Circuit Transaxle Vehicle Harness Ground
      TR  Ground RET24 (BN/BU) C168a-20 Ground
      TR  Signal VET32 (VT) C168a-17 Ground
      TR  Power LE111 (VT/GN) C168a-18 Ground
    • Are all resistances greater than 10,000 ohms? 
    • Yes  : GO to D7  .
    • No  : REPAIR shorted circuit(s). RECONNECT all components. TEST the system for normal operation.
  7. D7 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO POWER 
    • Measure the voltage for the TR  sensor circuits between the transaxle vehicle harness C168a and ground using the following chart.
      TRANSAXLE VEHICLE HARNESS CHART

      Transmission Range Sensor Circuit Transaxle Vehicle Harness Ground
      TR  Ground RET24 (BN/BU) C168a-20 Ground
      TR  Signal VET32 (VT) C168a-17 Ground
      TR  Power LE111 (VT/GN) C168a-18 Ground
    • Is any voltage present? 
    • Yes  : REPAIR shorted circuit(s). RECONNECT all components. TEST the system for normal operation.
    • No  : GO to D8  .
  8. D8 CHECK FOR A SHORT BETWEEN D8 CHECK FOR A SHORT BETWEEN/PCM INPUT SIGNAL CIRCUITS 
    • Measure the resistance between TR  sensor circuits at the transaxle vehicle harness C168a using the following chart.
      TRANSAXLE VEHICLE HARNESS CHART

      Transaxle Vehicle Harness TR  Sensor Circuit Transaxle Vehicle Harness
      C168a-20 TR  Ground RET24 (BN/BU) C168a-17 and C168a-18
      C168a-17 TR  Signal VET32 (VT) C168a-18 and C168a-20
      C168a-18 TR  Power LE111 (VT/GN) C168a-17 and C168a-20
    • Are all resistances greater than 10,000 ohms? 
    • Yes  : GO to D9  .
    • No  : REPAIR shorts on circuits having less than 10,000 ohms between other TR  /PCM input signal circuits. RECONNECT all components. TEST the system for normal operation.
  9. D9 CHECK FOR AN INTERNAL SOLENOID BODY OPEN FOR THE D9 CHECK FOR AN INTERNAL SOLENOID BODY OPEN FOR THE SENSOR CIRCUITS 
    • Remove the main control cover. Refer to MAIN CONTROL COVER .
    • Disconnect: TR  Sensor Connector.
    • 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 of the TR  sensor circuits between the solenoid body leadframe main connector, component side and the TR  sensor connector, leadframe side.
      SOLENOID BODY LEADFRAME MAIN CONNECTOR PIN NUMBER REFERENCE

      Solenoid Body Leadframe Main Connector Pin Number TR  Sensor Pin Number Circuit Function (Wire Color)
      18 1 Transmission Range (TR) power (RD)
      17 2 TR  signal (WH)
      20 3 TR  ground (BK)
      Fig 1: Identifying Solenoid Body Leadframe Main Connector Terminals
      G06278272Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to D10  .
    • No  : INSTALL a new solenoid body leadframe. REFER to SOLENOID BODY LEADFRAME . RECONNECT all components. TEST the system for normal operation.
  10. D10 CHECK FOR VOLTAGE AND GROUND AT THE D10 CHECK FOR VOLTAGE AND GROUND AT THE SENSOR CONNECTOR 
    • Connect: PCM C175T.
    • Connect: Transaxle Vehicle Harness C168a.
    • Ignition ON.
    • Measure the voltage on the solenoid body leadframe between TR  sensor connector pins 1 (RD) and 3 (BK) solenoid body leadframe side.
      Fig 2: Measuring Voltage Between TR Sensor Connector Pins 1 And 3 Solenoid Body Leadframe Side
      G06278273Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
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