Circuit Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The torque converter clutch (TCC) enable solenoid valve is used with the lock-up shift valve, lock-up control valve and lock-up timing valve, in order to control TCC apply and release in response to PCM commands. When it is energized, it allows the fluid pressure from the TCC pressure control (PC) solenoid valve to be exhausted. When it is de-energized, it allows the fluid pressure to apply to the lock-up shift valve. The PCM has a diagnosis circuit inside, to monitor the voltage level to the TCC enable solenoid valve, and receives a return signal.
When the PCM detects an open or short to voltage on the TCC enable solenoid valve high control circuit, DTC 2770 sets. DTC P2770 is a type A DTC.