DTC P1740 Lock-Up Select Solenoid Valve Circuit: Description

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

The lock-up select solenoid valve is included in the control valve assembly.
The lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake pressure).
When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.