LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1643 (Automatic Transaxle - 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 2006 Mercury Montego and 2006 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).
  3. C2 CHECK OSS SENSOR RESISTANCE (Continued) 
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 19 and 20.
      Fig 1: Checking OSS Sensor Resistance
      G04657268Courtesy 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.

  4. 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: Checking OSS Sensor For Short To Ground (1 Of 2)
      G04657269Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 20 and ground.
      Fig 3: Checking OSS Sensor For Short To Ground (2 Of 2)
      G04657270Courtesy 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.

  5. C4 CHECK OSS SENSOR RESISTANCE 
    • Remove the transmission side cover.
  6. C4 CHECK OSS SENSOR RESISTANCE (Continued) 
    • Measure the resistance at the speed sensor electrical connector between pin 1 and 2.
      Fig 4: Checking OSS Sensor Resistance
      G04657271Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes:  INSTALL a new internal harness.

    No:  INSTALL a new transaxle assembly.

scientia non olet · About LEMON Manuals