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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 983 (Automatic Transmission - Cd4E) >> Diagnostic Tests >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test E: Electronic Pressure Control (EPC) Solenoid

Pinpoint Test E: Electronic Pressure Control (EPC) Solenoid

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. E1 CHECK FOR BATTERY VOLTAGE AT THE TRANSAXLE CONNECTOR 
    CAUTION: Do not pry on the connector. This will damage the connector and may result in a transaxle concern. Press button and pull up on the transaxle vehicle harness connector.
    • Disconnect: Transaxle Connector C199
    • Inspect the transaxle vehicle harness connector for damage. Make sure the pins are fully engaged and in good condition before proceeding.
    • Ignition ON.
    • Measure the voltage at transaxle vehicle harness C199-9, circuit CBB24 (VT/GN).
      • Fig 1: Measuring Voltage
      G00571349Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E4.
    2. NO  : Go to  E2.
  2. E2 CHECK BATTERY CONTROL MODULE (BCM) FUSE 24 (10A) 
    • Check fuse: Battery Control Module (BCM) Fuse 24 (10A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E3.
    2. NO  : REPAIR circuit CBB24 (VT/GN) or circuit CBB28 (GY/VT) for a short to ground. CONNECT all electrical connectors. TEST the system for normal operation.
  3. E3 CHECK THE SOLENOID POWER SUPPLY CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: BCM Fuse 24 (10A)
    • Measure the resistance between the output side of BCM fuse 24 (10A) or circuit CBB28 (GY/VT) and transaxle vehicle harness C199-9, circuit CBB24 (VT/GN).
      • Fig 2: Measuring Resistance
      G00571350Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Circuit CBB24 (VT/GN) or circuit CBB28 (GY/VT) has an intermittent open circuit. REPEAT this test step while wiggling the wiring harness. INSPECT the vehicle wiring harness for damage and repair as necessary.
    2. NO  : REPAIR circuit CBB24 (VT/GN) or circuit CBB28 (GY/VT) for an open. CONNECT all electrical connectors. TEST the system for normal operation.
  4. E4 CHECK SOLENOID CONTROL CIRCUIT FOR A SHORT TO POWER AND GROUND 
    • Disconnect: PCM Connector C175T
    • Inspect the PCM connector for damage. Make sure the pins are fully engaged and in good condition before proceeding.
    • Measure the resistance between PCM C175T-11, circuit CET05 (BU/GN) and ground and transaxle vehicle harness C199-9, circuit CBB24 (VT/GN).
      • Fig 3: Measuring Resistance
      G00571351Courtesy of FORD MOTOR CO.
    • Is each resistance greater than 10,000 ohms? 
    1. YES  : Go to  E5.
    2. NO  : REPAIR circuit CET05 (BU/GN) for a short. CONNECT all components. TEST the system for normal operation.
  5. E5 CHECK THE SOLENOID CONTROL CIRCUIT FOR AN OPEN 
    • Measure the resistance between PCM C175T-11, circuit CET05 (BU/GN) and transaxle connector C199-10, circuit CET05 (BU/GN).
      • Fig 4: Checking Circuit For Open
      GF0024731Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR circuit CET05 (BU/GN) for an open. CONNECT all components. TEST the system for normal operation.
  6. E6 CHECK THE RESISTANCE OF THE SOLENOID FIELD CIRCUIT 
    • Measure the resistance between transaxle connector pin 9, and pin 10, component side.
      • Fig 5: Measuring Resistance
      G00571352Courtesy of FORD MOTOR CO.
    • Is the resistance between 3.75 and 5.92 ohms? 
    1. YES  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.3L article or ELECTRONIC ENGINE CONTROLS - 3.0L (4V) article. RECONNECT all components. TEST the system for normal operation. If symptoms are still present, REFER to Diagnosis By Symptom .
    2. NO  : INSTALL a new main control assembly. REFER toMain Control Valve Body . CONNECT all components. TEST the system for normal operation.
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