37 Torque Converter Clutch Solenoid Circuit - (P 0743)

37 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT - (P 0743) (AUTOMATIC TRANSMISSIONS ONLY)

ENABLING CONDITIONS
- Battery voltage must be at least 10 volts
- Ignition must be on

The Malfunction Indicator Lamp (MIL) illuminates and a Diagnostic Trouble Code (DTC) is stored when the Powertrain Control Module (PCM) recognizes that the voltage at pin 17 is low and the PCM has requested that the solenoid be de-energized, or if the voltage is high when the PCM has requested that the solenoid be energized. The malfunctioning condition must last for at least three seconds.

This malfunction could possibly be caused by problems with any of the following components:

- Part Throttle Unlock (PTU) solenoid
- PTU solenoid wiring or related connectors (open or short)
- PCM