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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1081 (Automatic Transmission - 6 Speed) >> Diagnosis And Testing >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test C: Output Shaft Speed (OSS) Sensors

Pinpoint Test C: Output Shaft Speed (OSS) Sensors

WARNING: This page is about a different car, the 2005 Mercury Montego and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 ELECTRONIC DIAGNOSTICS 
    • Check to make sure the transmission control module connector is fully seated, pins are fully engaged in connector and in good condition before proceeding.
    • Connect the scan tool.
    • Key in ON position.
    • Monitor the PID for the output shaft speed (OSS) sensor.
    • Monitor and record speed.
    • Does the OSS match the vehicle speed? 
    • Yes  : CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, GO to C2.
    • No  : GO to C2.
  2. C2 CHECK OSS SENSOR RESISTANCE 
    • Remove the transmission control module (TCM).
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 19 and 20.
      Fig 1: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 19 And 20
      G03991662Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, GO to C3.
    • No  : GO to  C4.
  3. C3 CHECK OSS SENSOR FOR SHORT TO GROUND 
    • Remove the transmission control module (TCM).
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 19 and ground.
      Fig 2: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 19 And Ground
      G03991663Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 20 and ground.
      Fig 3: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 20 And Ground
      G03991664Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : INSTALL a new transmission control module (TCM) and re-flash to the latest level calibration. CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, GO to C4.
    • No  : GO to C4.
  4. C4 CHECK OSS SENSOR RESISTANCE 
    • Remove the transmission side cover.
    • Measure the resistance at the speed sensor electrical connector between pin 1 and 2.
      Fig 4: Measuring Resistance At Speed Sensor Electrical Connector Between Pin 1 And 2
      G03991665Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new internal harness.
    • No  : INSTALL a new transaxle assembly.
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