Pinpoint Test E: Transaxle Solenoid Pressure Control (TSPC) Circuit

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. 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 Connector 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.
- Key in ON position.
- Measure the voltage at the transaxle vehicle harness connector C168-15, circuit CET49 (BN).
- Is the voltage greater than 10 volts?
1. YES : INSTALL a new solenoid body. REFER to Solenoid Body Assembly . RECONNECT all components. TEST the system for normal operation.
2. NO : Go to E2 .
E2 CHECK THE TRANSAXLE SOLENOID PRESSURE CONTROL (TSPC) CIRCUIT FOR AN OPEN
- Key in OFF position.
- Disconnect: PCM Transaxle Connector C175t
- Measure the resistance between the PCM transaxle connector C175t-47, circuit CET49 (BN) and transaxle vehicle harness connector C168-15, circuit CET49 (BN).
- Is the resistance less than 5 ohms?
1. YES : Go to E3.
2. NO : REPAIR circuit CET49 (BN) for an open. RECONNECT all components. TEST the system for normal operation.
E3 CHECK THE TSPC CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between the transaxle vehicle harness connector C168-15, circuit CET49 (BN) and ground.
- Is the resistance greater than 10,000 ohms?
1. YES : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . RECONNECT all components. TEST the system for normal operation.
2. NO : REPAIR circuit CET49 (BN) for a short to ground. RECONNECT all components. TEST the system for normal operation.