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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 892 (Automatic Transmission) >> Diagnostic Tests >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test E: Turbine Shaft Speed (TSS), Intermediate Shaft Speed And Output Shaft Speed (OSS) Sensors

Pinpoint Test E: Turbine Shaft Speed (TSS), Intermediate Shaft Speed And Output Shaft Speed (OSS) Sensors

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the turbine shaft speed (TSS), intermediate shaft speed and output shaft speed (OSS) sensor connector illustrations Transmission Connector Layouts .
  1. E1 ELECTRONIC DIAGNOSTICS 
    • Select PARK.
    • Key in OFF position.
    • Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Access the transmission PIDs.
    • Is the scan tool able to access the transmission PIDs? 
    1. YES  : Go to  E2.
    2. NO  : REPEAT procedure to access the transmission PIDs. If the scan tool did not access the transmissions PIDs, REFER to the INTRODUCTION - GASOLINE ENGINES for diagnosis of PCM.
  2. E2 DRIVE CYCLE TEST 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
    • Does the TSS, intermediate shaft speed or OSS PID increase and decrease with engine and vehicle speed or is the sensor signal erratic (drop to zero or near zero and return to normal operation)? 
    1. YES  : If the TSS, intermediate shaft speed or OSS PIDs increase and decrease with engine and vehicle speed, CLEAR all DTCs. ROAD TEST to verify if concern is still present. If concern is still present, REFER to the Diagnosis by Symptom Index in Diagnosis By Symptom  for diagnosis.

      If the sensor signal is erratic, INSPECT for intermittent concern in the internal/external harness, sensor or connector.

    2. NO  : If the TSS, intermediate shaft speed or OSS PID does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness, sensor, a PCM concern or internal hardware concern.

      If the sensor signal is steady, go to  E3.

  3. E3 CHECK RESISTANCE OF TSS, INTERMEDIATE SHAFT SPEED OR OSS SENSOR 
    • Disconnect the appropriate vehicle harness connector from the intermediate shaft speed or OSS sensor. For the TSS sensor, disconnect the vehicle harness connector from the transmission.
    • Remove the intermediate shaft speed sensor or OSS.
      • Fig 1: Connecting Ohmmeter Negative Lead To One Pin Of Sensor
      GF0009973Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed or OSS: Connect ohmmeter negative lead to one pin of the sensor and the positive lead to the other pin on the sensor.
      • Fig 2: Connecting Ohmmeter Negative Lead To Signal Return Pin
      GF0009974Courtesy of FORD MOTOR CO.
    • For TSS: Connect ohmmeter negative lead to the signal return pin and the positive lead to the TSS signal at the transmission connector.
    • Record the resistance. Resistance should be as follows:
      Sensor Resistance (ohms)
      TSS 64-126
      Intermediate Shaft Speed 325-615
      OSS 305-735
    • Is the resistance within specification for the appropriate sensor? 
    1. YES  : REFER to the Diagnosis by Symptom Index in Diagnosis By Symptom  for concern diagnosis.
    2. NO  : INSTALL a new sensor.
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