Pinpoint Test C: Transmission Range (Tr) Sensor

• Using a scan tool, view the TR_1, TR_2, TR_3 and TR_4 PIDs to determine if an internal fault is present in the transmission range (TR) sensor, refer to TRANSMISSION RANGE (TR) SENSOR DIAGNOSTIC PID CHART  in Transaxle Connector Layouts in this article.
  • If an electrical issue exists in the TR sensor electrical circuit, 2 or more binary positions will show 1's.
  EXAMPLE OF BINARY POSITION
  
  

  Range Selection	PID Code	Result
  Reverse or Drive	1100 (Reverse and Drive input detected)	High probability of a tail lamp ground concern. Clean grounds.
  Drive or Manual 1	0101 (Drive and Manual 1 input detected)	High probability of internal arcing inside the TR sensor.

• Verify TR sensor alignment.
• Is the TR sensor correctly aligned? 

Yes  : GO to  C2.

No  : ADJUST the TR sensor. TEST the system for normal operation.

• Verify that the shift cable/linkage is correctly adjusted. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION EXTERNAL CONTROLS .
• Is the shift cable/linkage correctly adjusted? 

Yes  : GO to  C3.

No  : ADJUST the shift cable/linkage REFER to AUTOMATIC TRANSAXLE-TRANSMISSION EXTERNAL CONTROLS . TEST the system for normal operation.

• Disconnect: TR Sensor Connector.
• Key in ON position.
• Measure the voltage between TR sensor connector pin 1, harness side and ground.
  Fig 1: Checking Power Supply Transaxle Circuit For Open

  Courtesy of FORD MOTOR CO.
• Is the voltage greater than 10 volts? 

Yes  : GO to  C4.

No  : REPAIR power supply circuit 15 (GN/OG). TEST the system for normal operation.

• Select PARK.
• Key in ON position.
• Measure the voltage between TR sensor connector pins 2, 3, 4, 5, 7 and 8 harness side and ground.
  Fig 2: Checking TR Sensor Circuitry For Short To Power

  Courtesy of FORD MOTOR CO.
• Is voltage present? 

Yes  : GO to  C5.

No  : GO to  C7.

• Key in OFF position.
• Disconnect: PCM Connector.
• Key in ON position.
• Measure the voltage between TR sensor connector pins 2, 3, 4, 5, 7 and 8 harness side and ground.
  Fig 3: Checking PCM For Short To Power

  Courtesy of FORD MOTOR CO.
• Is voltage present? 

Yes  : REPAIR the circuit in question. TEST the system for normal operation.

No  : INSTALL a new PCM. TEST the system for normal operation.

• Key in OFF position.
• Disconnect: PCM Connector.
• Disconnect: Fuse F2.40 (10A).
• Measure the resistance between TR sensor connector pins 2, 3, 4, 5, 7 and 8 harness side and ground.
  Fig 4: Checking Vehicle Harness For Short To Ground

  Courtesy of FORD MOTOR CO.
• Is the resistance greater than 10,000 ohms? 

Yes  : INSTALL a new PCM. TEST the system for normal operation.

No  : REPAIR the circuit in question. TEST the system for normal operation.

• Key in OFF position.
• Connect: PCM Connector.
• Disconnect: Fuse F2.40 (10A).
• Measure the resistance between TR sensor connector pins 2, 3, 4, 5, 7 and 8 harness side and ground.
  Fig 5: Checking TR Sensor Circuitry For Short To Ground

  Courtesy of FORD MOTOR CO.
• Is the resistance greater than 10,000 ohms? 

Yes  : GO to  C8.

No  : GO to  C6.

• Connect: Fuse F2.40 (10A).
• Measure the resistance between TR sensor connector pins, component side, as follows:
  • PARK position, TR sensor pins 6 and 5, 8 and 9 less than 1,000 ohms.
  • REVERSE position, TR sensor pins 1 and 4 less than 1,000 ohms.
  • NEUTRAL position, TR sensor pins 1 and 8 less than 1,000 ohms.
  • DRIVE position, TR sensor pins 1 and 2 less than 1,000 ohms.
  • 2 position, TR sensor pins 1 and 7 less than 1,000 ohms.
  • 1 position, TR sensor pins 1 and 3 less than 1,000 ohms.
• Are the resistances within the expected values? 

Yes  : INSTALL a new PCM. TEST the system for normal operation.

No  : INSTALL a new TR sensor. TEST the system for normal operation.