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Pinpoint Test E: Transaxle Solenoid Pressure Control Circuit

NOTE: Refer to the Transaxle Vehicle Harness Connector illustration TRANSAXLE CONNECTOR LAYOUTS in this service information.
  1. E1 CHECK FOR VOLTAGE AT THE TRANSAXLE VEHICLE HARNESS CONNECTOR 
    • Disconnect: Transaxle Vehicle Harness C1520A.
    • Use a mirror to inspect both ends of the connector for damage or pushed-out terminals, corrosion, loose wires and missing or damaged seals.
    • Ignition ON.
    • Measure the voltage between the transaxle vehicle harness C1520A-5, circuit CET25 (BU/GN) and ground.
      Fig 1: Measuring Voltage Between Transaxle Vehicle Harness C1520A-5, Circuit CET25 (BU/GN) And Ground
      G07782653Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : INSTALL a new Line Pressure Control (LPC) solenoid. REFER to SOLENOIDS in this service information. RECONNECT all components. TEST the system for normal operation.
    2. No  : GO to E2.
  2. E2 CHECK THE TRANSAXLE SOLENOID PRESSURE CONTROL CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: PCM Transaxle Harness C175T.
    • Measure the resistance between the PCM transaxle C175T-50, circuit CET25 (BU/GN) and transaxle vehicle harness C1520A-5, circuit CET25 (BU/GN).
      Fig 2: Measuring Resistance Between PCM Transaxle C175T-50 And Transaxle Vehicle Harness C1520A-5, Circuit CET25 (BU/GN)
      G07782654Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to E3.
    2. No  : REPAIR circuit CET25 (BU/GN) for an open. RECONNECT all components. TEST the system for normal operation.
  3. E3 CHECK THE TRANSAXLE SOLENOID POWER CONTROL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between the transaxle vehicle harness C1520A-5, circuit CET25 (BU/GN) and ground.
      Fig 3: Measuring Resistance Between Transaxle Vehicle Harness C1520A-5, Circuit CET25 (BU/GN) And Ground
      G07782655Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L FUSION & MILAN (EXCEPT HYBRID)--> article orELECTRONIC ENGINE CONTROLS - 3.0L (4V) FUSION & MILAN--> article. RECONNECT all components. TEST the system for normal operation.
    2. No  : REPAIR circuit CET25 (BU/GN) for a short to ground. RECONNECT all components. TEST the system for normal operation.
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