Circuit/System Description
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. PC solenoid 2 controls transmission fluid pressure to the hybrid direct, 2-3-4 clutch regulator valve. When PC solenoid 2 is commanded ON, the TCM compares the known transmission fluid pressure (TFP) switch 3 state with the actual TFP switch 3 state. Depending one the commanded mode or gear, the clutch PC solenoid 2 controls fluid pressure to the following components:
In the ON position, PC solenoid 2 controls transmission fluid to the following components:
- EVT 1 mode, oil is supplied to drive motors 1 and 2 for cooling and the hybrid low, 1-2 clutch.
- EVT 2 mode, oil is supplied to drive motors 1 and 2 for cooling and the hybrid direct, 2-3-4 clutch.
- Gear 1, oil is supplied to the hybrid low, 1-2 clutch and the 1-3 clutch.
In the ON position, PC solenoid 2 controls the transmission fluid to the following components:
- Gear 2, oil is supplied to the hybrid low, 1-2 clutch and the hybrid direct, 2-3-4 clutch.
- Gear 3, oil is supplied to the hybrid direct, 2-3-4 clutch and the 1-3 clutch.
- Gear 4, oil is supplied to the hybrid direct, 2-3-4 clutch and the 4th clutch.