LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1148 (Automatic Transmission - Cd4E) >> Diagnostic Tests >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test F: Turbine Shaft Speed (TSS) Sensor And Output Shaft Speed (OSS) Sensor

Pinpoint Test F: Turbine Shaft Speed (TSS) Sensor And Output Shaft Speed (OSS) Sensor

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the output shaft speed (OSS) sensor or turbine shaft speed (TSS) sensor connector illustrations preceding these pinpoint tests.
  1. F1 ELECTRONIC DIAGNOSTICS 
    • 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.
    • Enter the following diagnostic mode on the diagnostic tool: Diagnose Data Link
    • Enter the following diagnostic mode on the diagnostic tool: PCM
    • Select PID/Data Monitor and Record.
    • Select the following PIDs: TSS, OSS.
    • Does the vehicle enter PID/Data Monitor and Record? 
    1. YES  : REMAIN in PID/DATA. Go to  F2 .
    2. NO  : RERUN procedure to enter PID. If vehicle did not enter PID, REFER to the Introduction - Gasoline Engines article.
  2. F2 DRIVE CYCLE TEST 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all the gears.
    • Does the TSS or OSS Speed 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 or OSS Speed PID 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 Diagnosis By Symptom  .
    2. If the sensor signal is erratic, INSPECT for intermittent concern in the external harness, sensor, PCM or connector.
    3. NO  : If the TSS or OSS Speed PID does not increase and decrease with engine and vehicle speed, the sensor signal is steady. INSPECT for open or short in vehicle harness, sensor, a PCM concern or internal hardware concern. Go to  F3 .
  3. F3 CHECK CONTINUITY OF TSS OR OSS HARNESS CIRCUITS 
    CAUTION: Do not pry on the connector. This will damage the connector and may result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector.
    • Key in OFF position.
    • Disconnect: Turbine Shaft Speed (TSS) Sensor Electrical Connector C143 or Output Shaft Speed (OSS) Sensor Electrical Connector C193
    • Disconnect: PCM Connector C175T
    • Disconnect: PCM Connector C175B
    • Inspect for damaged or pushed-out pins, corrosion or loose wires.
    • Measure the resistance between PCM connector C175T-15, circuit VET33 (WH/OG) and TSS sensor connector C143-2, circuit VET33 (WH/OG).
      • Fig 1: Checking Circuit For Open
      GF0024737Courtesy of FORD MOTOR CO.
    • Measure the resistance between PCM connector C175B-50, circuit RET33 (WH/VT) and TSS sensor connector C143-1, circuit RET33 (WH/VT).
      • Fig 2: Checking Circuit For Open
      GF0024738Courtesy of FORD MOTOR CO.
    • Measure the resistance between PCM connector C175T-4, circuit VET26 (BN/GN) and OSS sensor connector C193-2, circuit VET26 (BN/GN).
      • Fig 3: Checking Circuit For Open
      GF0024739Courtesy of FORD MOTOR CO.
    • Measure the resistance between PCM connector C175B-50, circuit RET33 (WH/VT) and OSS sensor connector C193-1, circuit RET33 (WH/VT).
      Fig 4: Checking Circuit For Open
      GF0024738Courtesy of FORD MOTOR CO.
    • Is each resistance less than 5 ohms? 
    1. YES  : Go to  F4.
    2. NO  : REPAIR the open circuit(s). RECONNECT all components. CLEAR the DTCs. RERUN On-Board Diagnostics.
  4. F4 CHECK TSS CIRCUITS OR OSS CIRCUITS FOR SHORT TO POWER AND GROUND 
    • Key in OFF position.
    • Measure the resistance between the PCM connector C175T-15, circuit VET33 (WH/OG) and the PCM connector C175B pins 35, circuit CBB28 (GY/VT) and 36, circuit CBB28 (GY/VT).
      • Fig 5: Checking Circuits For Short Together
      GF0024740Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM connector C175T-4, circuit VET26 (BN/GN) and the PCM connector C175B pins 35, circuit CBB28 (GY/VT) and 36, circuit CBB28 (GY/VT).
      • Fig 6: Checking Circuits For Short Together
      GF0024741Courtesy of FORD MOTOR CO.
      Fig 7: Checking Circuits For Short Together
      GF0042353Courtesy of FORD MOTOR CO.
    • For the TSS and OSS (-), measure the resistance between PCM connector C175B-50, circuit RET33 (WH/VT) and pins 35, circuit CBB28 (GY/VT) and 36, circuit CBB28 (GY/VT).
    • Measure the resistance between the PCM connectorC175T-15, circuit VET33 (WH/OG)and the PCM connector C175B pins 47, circuit GD122 (BK) 48, circuit GD122 (BK), 49, circuit GD122 (BK) and 50, circuit RET33 (WH/VT).
      • Fig 8: Checking Circuits For Short Together
      GF0024743Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM connector C175T-4 and the PCM connector C175B pins 47, circuit GD122 (BK) 48, circuit GD122 (BK), 49, circuit GD122 (BK) and 50, circuit RET33 (WH/VT).
      • Fig 9: Checking Circuits For Short Together
      GF0024744Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM connector C175B-50, circuit RET33 (WH/VT) and PCM connector C175B pins 47, circuit GD122 (BK), 48, circuit GD122 (BK) and 49, circuit GD122 (BK).
      • Fig 10: Checking Circuits For Short Together
      GF0042354Courtesy of FORD MOTOR CO.
    • Is each resistance greater than 10,000 ohms? 
    1. YES  : Go to  F5.
    2. NO  : REPAIR the shorted circuit(s). RECONNECT all components. ERASE DTCs and RERUN On-Board Diagnostics.
  5. F5 CHECK RESISTANCE OF TSS OR OSS SENSOR 
    • Measure the resistance between TSS sensor or OSS sensor pins 1 and 2.
      • Fig 11: Measuring Resistance
      GF0042355Courtesy of FORD MOTOR CO.
    • Record the resistance.
      Sensor Resistance (Ohms)
      TSS 625-1,150
      OSS 503-1,010
    • Is resistance within specification for the appropriate sensor? 
    1. YES  : Go to  F6.
    2. NO  : INSTALL a new TSS/OSS sensor. REFER to Turbine Shaft Speed (TSS) Sensor  or Output Shaft Speed (OSS) Sensor . TEST the system for normal operation.
  6. F6 CHECK SENSOR FOR SHORT TO GROUND 
    • Measure the resistance between ground and TSS sensor or OSS sensor pins 1 and 2.
      • Fig 12: Measuring Resistance
      GF0042356Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : For TSS, go to  F7 .
    2. For OSS, go to  F9 .
    3. NO  : INSTALL a new TSS or OSS sensor. REFER to Turbine Shaft Speed (TSS) Sensor  or Output Shaft Speed (OSS) Sensor . Go to  F5 .
  7. F7 CHECK TSS MAGNETISM 
    • Remove the TSS sensor from transaxle.
    • Place the TSS sensor against a metal surface to which it should stick. The TSS sensor should be magnetized and stick to the metal surface.
    • Does TSS sensor stick? 
    1. YES  : Go to  F8.
    2. NO  : INSTALL a new TSS sensor. REFER to Turbine Shaft Speed (TSS) Sensor .
  8. F8 CHECK EXCITER WHEEL 
    NOTE: Make sure a tooth is visible. The exciter wheel will always be visible through the TSS sensor hole.
    • Remove the TSS sensor.
    • With a remote starter switch, start and stop engine until a tooth of the exciter wheel is visible through the TSS sensor hole.
      • Fig 13: Checking Exciter Wheel
      GF0024747Courtesy of FORD MOTOR CO.
    • Are all 4 teeth present? 
    1. YES  : INSTALL a new TSS sensor. REFER to Turbine Shaft Speed (TSS) Sensor . TEST the system for normal operation.
    2. NO  : REPAIR or INSTALL a new exciter wheel as necessary. TEST the system for normal operation.
  9. F9 CHECK OSS MAGNETISM 
    • Remove OSS sensor from transaxle.
    • Place the OSS sensor against a metal surface to which it should stick. The OSS sensor should be magnetized and stick to the metal surface.
    • Does the OSS sensor stick? 
    1. YES  : The concern is not in the OSS sensor system. REFER to Diagnosis By Symptom  shift concerns for further diagnosis.
    2. NO  : INSTALL a new OSS sensor. REFER to Output Shaft Speed (OSS) Sensor .
scientia non olet · About LEMON Manuals