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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 455 (Automatic Transmission - F250-F550 Super Duty) >> Diagnosis And Testing >> Pinpoint Tests - OSC Equipped Vehicle >> Testing >> Pinpoint Test C: Transmission Range (TR-P) Sensor

Pinpoint Test C: Transmission Range (TR-P) Sensor

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transmission Connector Layouts  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 .
  1. C1 VERIFY THE DIAGNOSTIC TROUBLE CODES 
    • Key in OFF position.
    • Select PARK.
    • Carry out On-Board Diagnostic Test.
    • Are only TR-P DTC codes present? 

    Yes  : GO to  C3.

    No  : GO to C2.

  2. C2 VERIFY THE SHIFT CABLE/LINKAGE ADJUSTMENT 

    Yes  : GO to C3.

    No  : ADJUST the shift cable/linkage. REFER to AUTOMATIC 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? 

    Yes  : The problem is not in the TR-P. REFER to STARTING SYSTEM - DIESEL ENGINE .

    REFER to the INTRODUCTION - GASOLINE for further diagnosis of the PCM, starting system and reverse lamps.

    No  : GO to C4.

  4. C4 CHECK THE ELECTRICAL SYSTEM OPERATION (TR-P AND PCM) 
    • Select PARK.
    • Connect the scan tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the scan tool: Diagnostic Mode.
    • Enter the following diagnostic mode on the scan 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-P 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-P Duty Cycle range? 

      Does PID: TR_DC remain steady when the harness is wiggled, the sensor is tapped or the vehicle is driven? 

    Yes  : The problem is not in the digital TR sensor system. REFER to DIAGNOSIS BY SYMPTOM  for additional diagnosis.

    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: Transmission PCM Connector.
    • Disconnect: Transmission Bulkhead Connector.
    • Measure the resistance between pin 15 of the transmission bulkhead connector harness side and the appropriate TR-P signal pin at the transmission PCM connector, harness side.
    • Measure the resistance between pin 17 of the transmission bulkhead connector harness side and the appropriate TR-P ground pin at the transmission PCM connector, harness side.
    • Measure the resistance between pin 21 of the transmission bulkhead connector harness side and the appropriate TR-P power pin at the transmission PCM connector, harness side.
    • Are the resistances less than 5 ohms? 

    Yes  : GO to C6.

    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 the appropriate pin at the PCM connector, harness side.
    • Measure the resistance between pin 17 of the transmission bulkhead connector harness side and the appropriate pin at the PCM connector, harness side.
    • Measure the resistance between pin 15 of the transmission bulkhead connector harness side and the appropriate pin at the PCM connector, harness side.
    • Measure the resistance between pin 1 of the transmission bulkhead connector harness side and the appropriate pin at the PCM connector, harness side.
    • Are the resistances greater than 10,000 ohms? 

    Yes  : GO to C7.

    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 scan 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? 

    Yes  : INSTALL a new internal harness.

    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? 

    Yes  : INSTALL a new internal harness.

    No  : INSTALL a new TR-P sensor assembly. REFER to DIGITAL TRANSMISSION RANGE (TR) SENSOR . CLEAR DTCs and RERUN OBD Tests.

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