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Pinpoint Test D: Tr Sensor

WARNING: This page is about a different car, the 2012 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 in 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 
  3. D3 CHECK THE ELECTRICAL SIGNAL OPERATION 
    • Select PARK.
    • Disconnect: PCM Transaxle C175T.
    • Disconnect: Transaxle Vehicle Harness C1520A.
    • Use a mirror to inspect both ends of the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.
    • Is there damage to the connectors, terminals or harness? 
      • Yes:  REPAIR as required. CLEAR the 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 C1520A.
    • 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 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 C1520A.
    • Measure the resistance for the TR sensor circuits between the transaxle vehicle harness C1520A and the PCM transaxle harness C175T using the following chart.
      Transmission Range Sensor Circuit Transaxle Vehicle Harness PCM
      TR Ground RET24 (BN/BU) C1520A-20 C175T-36
      TR Signal VET32 (VT) C1520A-17 C175T-39
      TR Power LE111 (VT/GN) C1520A-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 C1520B.
    • Measure the resistance for the TR sensor circuits between the transaxle vehicle harness C1520A and ground using the following chart.
      Transmission Range Sensor Circuit Transaxle Vehicle Harness Ground
      TR Ground RET24 (BN/BU) C1520A-20 Ground
      TR Signal VET32 (VT) C1520A-17 Ground
      TR Power LE111 (VT/GN) C1520A-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 C1520A and ground using the following chart.
      Transmission Range Sensor Circuit Transaxle Vehicle Harness Ground
      TR Ground RET24 (BN/BU) C1520A-20 Ground
      TR Signal VET32 (VT) C1520A-17 Ground
      TR Power LE111 (VT/GN) C1520A-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 TR/PCM INPUT SIGNAL CIRCUITS 
    • Measure the resistance between TR sensor circuits at the transaxle vehicle harness C1520A using the following chart.
      Transaxle Vehicle Harness TR Sensor Circuit Transaxle Vehicle Harness
      C1520A-20 TR Ground RET24 (BN/BU) C1520A-17 and C1520A-18
      C1520A-17 TR Signal VET32 (VT) C1520A-18 and C1520A-20
      C1520A-18 TR Power LE111 (VT/GN) C1520A-17 and C1520A-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 TR 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 terminals, 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 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: Measuring Resistance Of TR Sensor Circuits Between Solenoid Body Leadframe Main Connector, Component Side And TR Sensor Connector, Leadframe Side
      G06096937Courtesy 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 TR SENSOR CONNECTOR 
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