Pinpoint Test E: Transaxle Solenoid Pressure Control Circuit
WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to the Transaxle Vehicle Harness Connector illustration TRANSAXLE CONNECTOR LAYOUTS .
- E1 CHECK FOR VOLTAGE AT THE TRANSAXLE VEHICLE HARNESS CONNECTOR
- Disconnect: Transaxle Vehicle Harness C168a.
- Use a mirror to inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- Ignition ON.
- Measure the voltage between the transaxle vehicle harness C168a-5, circuit CET25 (BU/GN) and ground.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new transaxle pressure control solenoid. REFER to SOLENOIDS . RECONNECT all components. TEST the system for normal operation.
- No : GO to E2 .
- 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 C168-5, circuit CET25 (BU/GN).
- Is the resistance less than 5 ohms?
- Yes : GO to E3 .
- No : REPAIR circuit CET25 (BU/GN) for an open. RECONNECT all components. TEST the system for normal operation.
- E3 CHECK THE TRANSAXLE SOLENOID POWER CONTROL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between the transaxle vehicle harness C168a-5, circuit CET25 (BU/GN) and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L or ELECTRONIC ENGINE CONTROLS - 3.0L (4V) . RECONNECT all components. TEST the system for normal operation.
- No : REPAIR circuit CET25 (BU/GN) for a short to ground. RECONNECT all components. TEST the system for normal operation.