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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1410 (Automatic Transmission - FNR5) >> Diagnostic Tests >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test F: Intermediate Shaft Speed Sensor And OSS Sensor

Pinpoint Test F: Intermediate Shaft Speed Sensor And OSS Sensor

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Intermediate Shaft Speed Sensor and Output Shaft Speed (OSS) Sensor Connector illustrations Transaxle Connector Layouts .
  1. F1 ELECTRONIC DIAGNOSTICS SETUP 
    • Check to make sure the transaxle harness connectors are 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: DataLogger Mode
    • Select the intermediate shaft speed or OSS sensor PID.
    • Does vehicle enter DataLogger Mode? 
    1. YES  : REMAIN in DataLogger Mode. Go to  F2 .
    2. NO  : REPEAT procedure to ENTER DataLogger Mode. If vehicle did not enter DataLogger Mode, REFER to the Introduction - Gasoline Engines article for diagnosis of Transmission Control Module (TCM).
  2. F2 DRIVE CYCLE TEST 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
    • Does the intermediate shaft speed or OSS sensor PID increase and decrease with engine and vehicle speed? 
    1. YES  : Go to  F3.
    2. NO  : If the intermediate shaft speed or OSS sensor PID does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness, sensor, a TCM concern, or internal hardware concern. Go to  F4 .
  3. F3 DRIVE CYCLE TEST ERRATIC 
    • While monitoring the appropriate sensor PID, drive the vehicle so that the transaxle upshifts and downshifts through all gears.
    • Is the intermediate shaft speed or OSS sensor PID signal erratic (drop to zero or near zero and return to normal operation)? 
    1. YES  : If the sensor signal is erratic, INSPECT for intermittent concern in the harness, sensor or connector. Go to  F4 .
    2. NO  : CLEAR all DTCs. RERUN On-Board Diagnostic (OBD).
  4. F4 CHECK THE SENSOR BATTERY SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Intermediate Shaft Speed Sensor C1088
    • Disconnect: OSS Sensor C193
    • Disconnect: TCM C2352a
      • Fig 1: Checking Sensor Battery Supply Circuit For A Short To Ground (Intermediate Shaft Speed Sensor)
      GF0029732Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed sensor, measure the resistance between sensor C1088-3, circuit CE613 (WH/VT) and ground.
      • Fig 2: Checking Sensor Battery Supply Circuit For A Short To Ground (OSS Sensor)
      GF0029732Courtesy of FORD MOTOR CO.
    • For OSS, measure the resistance between OSS sensor C193-3, circuit CE613 (WH/VT) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F5.
    2. NO  : REPAIR the circuit for a short to ground. TEST the system for normal operation.
  5. F5 CHECK THE SENSOR BATTERY SUPPLY CIRCUIT FOR AN OPEN 
      Fig 3: Checking Sensor Battery Supply Circuit For An Open (Intermediate Shaft Speed Sensor)
      GF0029733Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed sensor, measure the resistance between intermediate shaft speed sensor C1088-3, circuit CE613 (WH/VT) and the TCM C2352A-10, circuit CE613 (WH/VT).
      • Fig 4: Checking Sensor Battery Supply Circuit For An Open (OSS Sensor)
      GF0029733Courtesy of FORD MOTOR CO.
    • For the OSS sensor, measure the resistance between OSS sensor C193-3, circuit CE613 (WH/VT) and TCM C2352A-10, circuit CE613 (WH/VT).
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F6.
    2. NO  : REPAIR the circuit for an open. TEST the system for normal operation.
  6. F6 CHECK THE GROUND CIRCUIT FOR AN OPEN 
      Fig 5: Measuring Resistance
      GF0029734Courtesy of FORD MOTOR CO.
    • Measure the resistance between OSS sensor C193-1, circuit GD120 (BK/GN) and ground.
      • Fig 6: Measuring Resistance
      GF0029734Courtesy of FORD MOTOR CO.
    • Measure the resistance between intermediate shaft speed sensor C1088-1, circuit VET28 (GY/VT) and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F7.
    2. NO  : REPAIR the sensor ground circuit for an open. TEST the system for normal operation.
  7. F7 CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
      Fig 7: Measuring Resistance
      GF0029735Courtesy of FORD MOTOR CO.
    • For OSS sensor, measure the resistance between OSS sensor C193-2, circuit VET26 (BN/GN) and ground.
      • Fig 8: Measuring Resistance
      GF0029735Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed sensor, measure the resistance between intermediate shaft speed sensor C1088-2, circuit VE822 (YE/BU) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F8.
    2. NO  : REPAIR the circuit for a short to ground. TEST the system for normal operation.
  8. F8 CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO POWER 
      Fig 9: Checking For Voltage At Sensor - OSS
      GF0029736Courtesy of FORD MOTOR CO.
    • For OSS sensor, measure the voltage between OSS sensor C193-2, circuit VET26 (BN/GN) and ground.
      • Fig 10: Checking For Voltage At Sensor - OSS
      GF0029736Courtesy of FORD MOTOR CO.
    • For intermediate shaft speed sensor, measure the voltage between intermediate shaft speed sensor C1088-2, circuit VE822 (YE/BU) and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR the circuit for a short to power. TEST the system for normal operation.
    2. NO  : Go to  F9.
  9. F9 CHECK THE SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    • Disconnect: TCM C2352b
      • Fig 11: Checking Sensor Signal Circuit For An Open - OSS
      GF0029737Courtesy of FORD MOTOR CO.
    • For the OSS sensor, measure the resistance between OSS C193-2, circuit VET26 (BN/GN) and TCM C2352B-17, circuit VET26 (BN/GN).
      • Fig 12: Checking Sensor Signal Circuit For An Open - Intermediate Shaft Speed Sensor
      GF0029738Courtesy of FORD MOTOR CO.
    • For the intermediate shaft speed sensor, measure the resistance between intermediate shaft speed sensor C1088-2, circuit VE822 (YE/BU) component side and TCM C2352B-19, circuit VE822 (YE/BU).
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  F10.
    2. NO  : REPAIR the circuit for an open. TEST the system for normal operation.
  10. F10 CHECK FOR VOLTAGE AT THE SENSOR 
    • Connect: TCM C2352A
    • Connect: TCM C2352B
    • Key in ON position.
      • Fig 13: Checking For Voltage At Sensor - OSS
      GF0029736Courtesy of FORD MOTOR CO.
    • Measure the voltage between OSS sensor C193-2, circuit VET26 (BN/GN) and ground.
      • Fig 14: Checking For Voltage At Sensor - OSS
      GF0029736Courtesy of FORD MOTOR CO.
    • Measure the voltage between intermediate shaft speed sensor C1088-2, circuit VE822 (YE/BU) and ground.
    • Is the voltage approximately 5 volts? 
    1. YES  : INSTALL a new sensor. TEST the system for normal operation.
    2. NO  : INSTALL a new TCM. TEST the system for normal operation.
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