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PINPOINT TEST D: Transmission Range (TR) SENSOR

WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transmission Range (TR) Sensor Connector illustration Transaxle Connector Layouts .
NOTE: Refer to the Transmission Range (TR) Sensor Diagnosis Chart preceding these pinpoint tests.
  1. D1 VERIFY DTCs 
    • Key in OFF position.
    • Select PARK.
    • Carry out the On-Board Diagnostic (OBD) Test. DTCs P0705 and P0708 cannot be set by an incorrectly adjusted selector lever cable.
    • Are only DTCs P0705, P0708 present? 
    1. YES  : Go to  D3.
    2. NO  : Go to  D2.
  2. D2 VERIFY SELECTOR LEVER CABLE/LINKAGE ADJUSTMENT 
    • Disconnect the selector lever cable end from the manual control lever.
    • Place the transaxle manual control lever in the DRIVE position.
    • Select DRIVE.
    • Reconnect the selector lever cable/linkage.
    • Verify that the selector lever cable/linkage is correctly adjusted. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article.
    • Is the selector lever cable/linkage correctly adjusted? 
    1. YES  : Go to  D3.
    2. NO  : ADJUST the selector lever cable/linkage. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article. Go to  D4 .
  3. D3 CHECK THE ELECTRICAL SIGNAL OPERATION 
    • Select PARK.
    • Disconnect: PCM Transaxle C175T
    • Disconnect: Transaxle Vehicle Harness C168
    • 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? 
    1. YES  : REPAIR as required. CLEAR DTCs and RERUN On-Board Diagnostic (OBD) Tests.
    2. NO  : Go to  D4 .
  4. D4 CHECK ELECTRICAL SYSTEM OPERATION TR AND PCM 
    • Key in OFF position.
    • Connect the diagnostic tool.
    • Connect: PCM Transaxle C175T
    • Connect: Transaxle Vehicle Harness C168
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: TR PIDs: TR, TR1, TR2, TR3, and TR4
    • Move the TR selector lever into each gear and stop.
    • Observe any of the following PIDs (vehicle-dependent), TR, TR1, TR2, TR3, and TR4 while wiggling harness, tapping on sensor or driving the vehicle.
    • Compare the PIDs to the Digital Transmission Range (TR) Sensor Diagnosis Chart.
    • Do the PIDs TR, TR1, TR2, TR3, TR4 match the Digital Transmission Range (TR) Sensor Diagnosis Chart, and do they remain steady when the harness is wiggled, the sensor is tapped on or the vehicle driven? 
    1. YES  : The problem is not in the digital TR sensor system. REFER to Diagnosis By Symptom  for further diagnosis.
    2. NO  : If the PIDs change when wiggling the harness, tapping on the sensor or driving the vehicle, the problem may be intermittent. Go to  D5.
  5. D5 CHECK THE TRANSAXLE VEHICLE TRANSAXLE HARNESS FOR AN OPEN 
    • Disconnect: PCM Transaxle C175T
    • Disconnect: Transaxle Vehicle Harness C168
    • Measure the resistance for the TR sensor circuits between the transaxle vehicle harness C168 and the PCM transaxle C175T.
      TR Sensor Circuit Transaxle Vehicle Harness C168 PCM Transaxle C175T
      TR-1 VET29 (VT/WH) C168-4 C175T-17
      TR-2 VET30 (YE) C168-5 C175T-18
      TR-3 VET31 (BU/OG) C168-6 C175T-19
      TR-4 VET32 (VT) C168-7 C175T-32
      TR Ground RET24 (BN/BU) C168-8 C175T-45
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  D6.
    2. 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 
    • Measure the resistance for the TR sensor circuits between the transaxle vehicle harness C168 and ground.
      TR Sensor Circuit Transaxle Vehicle Harness C168 Ground
      TR-1 VET29 (VT/WH) C168-4 Ground
      TR-2 VET30 (YE) C168-5 Ground
      TR-3 VET31 (BU/OG) C168-6 Ground
      TR-4 VET32 (VT) C168-7 Ground
      TR Ground RET24 (BN/BU) C168-8 Ground
    • Are all resistances greater than 10,000 ohms? 
    1. YES  : Go to  D7.
    2. 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 C168 and ground.
      TR Sensor Circuit Transaxle Vehicle Harness C168 Ground
      TR-1 VET29 (VT/WH) C168-4 Ground
      TR-2 VET30 (YE) C168-5 Ground
      TR-3 VET31 (BU/OG) C168-6 Ground
      TR-4 VET32 (VT) C168-7 Ground
      TR Ground RET24 (BN/BU) C168-8 Ground
    • Is any voltage present? 
    1. YES  : REPAIR shorted circuit(s). RECONNECT all components. TEST the system for normal operation.
    2. NO  : Go to  D8.
  8. D8 CHECK FOR A SHORT BETWEEN TR/PCM INPUT SIGNAL CIRCUITS 
    • Measure the resistance between TR sensor and PCM Transaxle C175T.
      TR Sensor Circuit PCM Transaxle C175T Ground
      TR-1 VET29 (VT/WH) C175T-17 Ground
      TR-2 VET30 (YE) C175T-18 Ground
      TR-3 VET31 (BU/OG) C175T-19 Ground
      TR-4 VET32 (VT) C175T-32 Ground
      TR Ground RET24 (BN/BU) C175T-45 Ground
    • Are all resistances greater than 10,000 ohms? 
    1. YES  : Go to  D9.
    2. 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 pins, corrosion, loose wires and missing or damaged seals.
    • Measure the resistance of the TR sensor circuits between the transaxle vehicle harness connector, component side and the TR sensor connector, solenoid body side.
      TR Sensor Circuit Transaxle Vehicle Harness Connector Pin (Component Side) TR Sensor Connector Pin (Solenoid Body Side)
      TR-1 4 5
      TR-2 5 4
      TR-3 6 3
      TR-4 7 2
      TR Ground 8 1
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new TR sensor. REFER to Digital Transmission Range (TR) Sensor . RECONNECT all components. TEST the system for normal operation.
    2. NO  : INSTALL a new solenoid body. REFER to Solenoid Body Assembly . RECONNECT all components. TEST the system for normal operation.
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