Pinpoint Test E: Transaxle Solenoid Power Control Circuit

NOTE: Refer to the Transaxle Vehicle Harness Connector illustration TRANSAXLE CONNECTOR LAYOUTS .

E1 CHECK FOR VOLTAGE AT THE TRANSAXLE VEHICLE HARNESS C168
- Disconnect: Transaxle Vehicle Harness C168.
- 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 at the transaxle vehicle harness C168-15, circuit CET49 (BN).
  
  Fig 1: Measuring Voltage At Transaxle Vehicle Harness C168-15, Circuit CET49 (BN)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . RECONNECT all components. TEST the system for normal operation.
- No : GO to E2.
E2 CHECK THE TRANSAXLE SOLENOID POWER CONTROL CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: PCM Transaxle C175T.
- Measure the resistance between the PCM transaxle C175T-47, circuit CET49 (BN) and transaxle vehicle harness C168-15, circuit CET49 (BN).
  
  Fig 2: Measuring Resistance Between PCM Transaxle C175T-47 And Transaxle Vehicle Harness C168-15 Pins
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to E3.
- No : REPAIR circuit CET49 (BN) 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 C168-15, circuit CET49 (BN) and ground.
  
  Fig 3: Measuring Resistance Between Transaxle Vehicle Harness C168-15 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . RECONNECT all components. TEST the system for normal operation.
- No : REPAIR circuit CET49 (BN) for a short to ground. RECONNECT all components. TEST the system for normal operation.