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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1275 (Automatic Transaxle/Transmission External Controls) >> Diagnosis And Testing >> External Controls >> Pinpoint Tests >> Pinpoint Test A: OVERDRIVF CANCEL SWITCH IS INOPERATIVE

Pinpoint Test A: OVERDRIVF CANCEL SWITCH IS INOPERATIVE

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK INPUT TO PCM
    • Key in OFF position.
    • Disconnect: PCM C175a.
    • Key in ON position.
    • Measure the voltage between PCM C175a pin 41, circuit 8-TA21 (WH/GN), harness side and ground.
      Fig 1: Measuring The Voltage Between PCM C175a Pin 41, Circuit 8-TA21 (WH/GN), Harness Side And Ground
      G03997797Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
  2. A2 CHECK FOR VOLTAGE TO FUSE 205 (5A) 
    • Key in ON position.
    • Measure the voltage between primary junction box fuse 205 (5A) input pin and ground.
      Fig 2: Measuring Voltage Between Primary Junction Box Fuse, Fuse 205 (5A) Input Pin And Ground
      G03997798Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to  A3.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  3. A3 CHECK FOR VOLTAGE INPUT TO THE SHIFTER 
    • Key in OFF position.
    • Disconnect: Transmission Shift Selector C307.
    • Key in ON position.
    • Measure the voltage between transmission shift selector C307 pin 7, circuit 15-TA21 (GN/BK), harness side and ground.
      Fig 3: Measuring Voltage Between Transmission Shift Selector C307 Pin 7, Circuit 15-TA21 (GN/BK), Harness Side And Ground
      G03997799Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to  A4.
    • No  : REPAIR circuit 15-DA5 (GN/OG) or 15-TA21 (GN/BK). TEST the system for normal operation.
  4. A4 CHECK CIRCUIT 8-TA21 (WH/GN) FOR SHORT TO GROUND 
    • Disconnect: PCM C175a.
    • Disconnect: Transmission Shift Selector C307.
    • Measure the resistance between transmission shift selector C307 pin 6, circuit 8-TA21 (WH/GN), harness side and ground.
      Fig 4: Measuring Resistance Between Transmission Shift Selector C307 Pin 6, Circuit 8-TA21 (WH/GN), Harness Side And Ground
      G03997800Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to  A5.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  5. A5 CHECK CIRCUIT 8-TA21 (WH/GN) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between PCM C175a pin 41, circuit 8-TA21 (WH/GN), harness side and transmission shift selector C307 pin 6, circuit 8-TA21 (WH/GN), harness side.
      Fig 5: Measuring Resistance Between PCM C175a Pin 41, Circuit 8-TA21 (WH/GN), Harness Side And Transmission Shift Selector C307 Pin 6, Circuit 8-TA21 (WH/GN), Harness Side
      G03997801Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new shifter harness. TEST the system for normal operation.
    • No  : REPAIR the circuit. TEST the system for normal operation.
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