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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1083 (Automatic Transmission) >> Diagnostic Tests >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test C: Turbine Shaft Speed (TSS) And Output Shaft Speed (OSS) Sensors

Pinpoint Test C: Turbine Shaft Speed (TSS) And Output Shaft Speed (OSS) Sensors

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transaxle Vehicle Harness Connector illustration Transaxle Connector Layouts .
NOTE: Refer to the Transaxle Internal Harness Diagram illustration Transaxle Connector Layouts .
  1. C1 ELECTRONIC DIAGNOSTICS 
    • Check to make sure the transaxle vehicle harness connector C168 is fully seated, terminals are engaged in connector and in good condition before proceeding.
    • Have the items above been checked? 
    1. YES  : Go to  C2 .
    2. NO  : CARRY OUT the checks. ERASE the codes. RERUN the On-Board Diagnostic Tests.
  2. C2 ELECTRONIC DIAGNOSTICS 
    • Connect the diagnostic tool.
    • Monitor the speed sensor PIDs while test driving the vehicle.
    • Are the TSS and OSS sensor signals present and consistent? 
    1. YES  : The condition that set the DTC is intermittent and is not currently present. ERASE the codes. RERUN the On-Board Diagnostic Tests.
    2. NO  : Go to  C3.
  3. C3 CHECK THE VEHICLE HARNESS FOR AN OPEN CIRCUIT 
    • Disconnect: Transaxle Vehicle Harness Connector C168
    • Disconnect: PCM Transaxle Electrical Connector C175t
    • Use a mirror to inspect both ends of the connectors for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
      • Fig 1: Measuring Resistance For Speed Sensor Circuits Between Transaxle Vehicle Harness Connector C168 & C175T
      GF0031611Courtesy of FORD MOTOR CO.
    • Measure the resistance for the speed sensor circuits between the transaxle vehicle harness connector C168 and the PCM transaxle connector C175t.
      Speed Sensor Circuit Transaxle Connector Pin PCM Connector Pin
      TSS/OSS power supply LE111 (VT/GN) 20 41
      TSS/OSS ground RET24 (BN/BU) 9 45
      TSS sensor signal VET33 (WH/OG) 19 15
      OSS sensor signal VET26 (BN/GN) 10 14
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C4.
    2. NO  : REPAIR the circuit(s) for an open. CONNECT all components. TEST the system for normal operation.
  4. C4 CHECK THE VEHICLE HARNESS FOR A SHORT TO GROUND 
      Fig 2: Measuring Resistance For Speed Sensor Circuits Between Transaxle Vehicle Harness Connector C168 & Ground
      GF0031612Courtesy of FORD MOTOR CO.
    • Measure the resistance for the speed sensor circuits between the transaxle vehicle harness connector C168 and ground.
      Speed Sensor Circuit Transaxle Connector Pin
      TSS/OSS power supply LE111 (VT/GN) 20
      TSS/OSS ground RET24 (BN/BU) 9
      TSS sensor signal VET33 (WH/OG) 19
      OSS sensor signal VET26 (BN/GN) 10
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  C5.
    2. NO  : REPAIR the circuit(s) for a short to ground. CONNECT all components. TEST the system for normal operation.
  5. C5 CHECK THE VEHICLE HARNESS FOR A SHORT TO VPWR 
      Fig 3: Checking For Voltage From Speed Sensor Circuits At Transaxle Vehicle Harness Connector C168
      GF0031613Courtesy of FORD MOTOR CO.
    • Check for voltage from the speed sensor circuits at the transaxle vehicle harness connector C168.
      Speed Sensor Circuit Transaxle Connector Pin
      TSS/OSS power supply LE111 (VT/GN) 20
      TSS/OSS ground RET24 (BN/BU) 9
      TSS sensor signal VET33 (WH/OG) 19
      OSS sensor signal VET26 (BN/GN) 10
    • Is any voltage present? 
    1. YES  : REPAIR the circuit(s) for a short to voltage. CONNECT all components. TEST the system for normal operation.
    2. NO  : Go to  C6.
  6. C6 CHECK THE SOLENOID BODY FOR AN INTERNAL OPEN CIRCUIT  
    • Remove the main control cover. Refer to Main Control Cover .
    • Disconnect: Turbine Shaft Speed (TSS) Sensor
    • Disconnect: Output Shaft Speed (OSS) Sensor
    • Use a mirror to inspect both ends of the connectors for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
      • Fig 4: Measuring Resistance Of Solenoid Body Internal Speed Sensor Power Circuit Between Main Solenoid Body Connector Pin 20 & OSS Sensor Connectors Pin 2
      GF0031614Courtesy of FORD MOTOR CO.
      NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor, the TSS sensor connector is below the main solenoid body connector.
    • Measure the resistance of the solenoid body internal speed sensor power circuit between the main solenoid body connector pin 20, solenoid body side and the TSS or OSS sensor connectors pin 2, solenoid body side.
      • Fig 5: Measuring Resistance Of Solenoid Body Internal Speed Sensor Power Circuit Between Main Solenoid Body Connector Pin 9 & OSS Sensor Connectors Pin 3
      GF0031615Courtesy of FORD MOTOR CO.
      NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
    • Measure the resistance of the solenoid body internal speed sensor ground circuit between the main solenoid body connector pin 9, solenoid body side and OSS sensor connector pin 3, solenoid body side.
      • Fig 6: Measuring Resistance Of Solenoid Body Internal Speed Sensor Power Circuit Between Main Solenoid Body Connector Pin 9 & TSS Sensor Connectors Pin 1
      GF0031616Courtesy of FORD MOTOR CO.
      NOTE: The TSS sensor connector is below the main solenoid body connector.
    • Measure the resistance of the solenoid body internal speed sensor ground circuit between the main solenoid body connector pin 9, solenoid body side and TSS sensor connector pin 1, solenoid body side.
      • Fig 7: Measuring Resistance Of Solenoid Body Internal Speed Sensor Power Circuit Between Main Solenoid Body Connector Pin 19 & TSS Sensor Connectors Pin 1
      GF0031617Courtesy of FORD MOTOR CO.
      NOTE: The TSS sensor connector is below the main solenoid body connector.
    • Measure the resistance of the solenoid body internal circuit for the TSS sensor signal between the main solenoid body connector pin 19, solenoid body side and TSS sensor connector pin 3, solenoid body side.
      • Fig 8: Measuring Resistance Of Solenoid Body Internal Speed Sensor Power Circuit Between Main Solenoid Body Connector Pin 10 & OSS Sensor Connectors Pin 1
      GF0031618Courtesy of FORD MOTOR CO.
      NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
    • Measure the resistance of the solenoid body internal circuit for the OSS sensor signal between the main solenoid body connector pin 10, solenoid body side and OSS sensor connector pin 1, solenoid body side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C7.
    2. NO  : INSTALL a new solenoid body. REFER to Solenoid Body Assembly . CONNECT all components. TEST the system for normal operation.
  7. C7 CHECK FOR VOLTAGE AT THE SPEED SENSOR CONNECTORS 
    • Connect: PCM C175t
    • Connect: Transaxle Vehicle Harness Connector C168
    • Key in ON position.
      • Fig 9: Measuring Voltage At TSS Sensor Connector Pin 2, Solenoid Body Side Or OSS Sensor Connector Pin 2
      GF0031619Courtesy of FORD MOTOR CO.
    • Measure the voltage at TSS sensor connector pin 2, solenoid body side or OSS sensor connector pin 2, solenoid body side.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C8.
    2. NO  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . CONNECT all components. TEST the system for normal operation.
  8. C8 CHECK FOR REFERENCE SIGNAL VOLTAGE AT THE SPEED SENSOR CONNECTORS 
      Fig 10: Measuring Voltage At TSS Sensor Connector Pin 3, Solenoid Body Side
      GF0031620Courtesy of FORD MOTOR CO.
      NOTE: The TSS sensor connector is below the main solenoid body connector.
    • Measure the voltage at TSS sensor connector pin 3, solenoid body side.
      • Fig 11: Measuring Voltage At OSS Sensor Connector Pin 1, Solenoid Body Side
      GF0031621Courtesy of FORD MOTOR CO.
      NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
    • Measure the voltage at OSS sensor connector pin 1, solenoid body side.
    • Is the voltage between 4.5 and 5.5 volts? 
    1. YES  : Go to  C9.
    2. NO  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . CONNECT all components. TEST the system for normal operation.
  9. C9 CHECK FOR GROUND AT THE SPEED SENSOR CONNECTORS 
      Fig 12: Measuring Resistance Between TSS Sensor Connector Pin 1, Solenoid Body Side & Ground
      GF0031622Courtesy of FORD MOTOR CO.
      NOTE: The TSS sensor connector is below the main solenoid body connector.
    • Measure the resistance between TSS sensor connector pin 1, solenoid body side and ground.
      • Fig 13: Measuring Resistance Between OSS Sensor Connector Pin 3, Solenoid Body Side & Ground
      GF0031623Courtesy of FORD MOTOR CO.
      NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
    • Measure the resistance between OSS sensor connector pin 3, solenoid body side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new speed sensor. REFER to Turbine Shaft Speed (TSS) Sensor  or Output Shaft Speed (OSS) Sensor . TEST the system for normal operation. If the condition is still present, INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS .
    2. NO  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . CONNECT all components. TEST the system for normal operation.
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