Shift Solenoid 1
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The shift solenoid 1 is energized, allowing actuator feed limit fluid to enter the solenoid 1 signal fluid circuit. Solenoid 1 signal fluid is routed to the shift solenoid valve - mode A. Solenoid 1 signal fluid is also routed to the hybrid direct, 2-3-4 clutch regulator valve where it enters the PS2 fluid circuit, and to the 1-3 clutch regulator valve where it enters the PS4 circuit.