Circuit/System Description
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
For an overview of the component/system, refer to:Electronic Component Description
| Circuit | Description |
|---|---|
| Control | The output circuit is switched to 12 V to activate the component. |
| Control | The output circuit is switched to ground to activate the component. |
| Component | Description |
|---|---|
| K71 Transmission Control Module | The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation. K71 is part of the component: Q8 Control Solenoid Valve Assembly |
| Q27D Pressure Control Solenoid Valve 4 | A solenoid valve is an electro-mechanically operated valve. The valve is controlled by an electric current through the solenoid. The solenoid valve varies the control pressure depending on the current applied to the solenoid coil.
Q27D is part of the component: Q8 Control Solenoid Valve Assembly |
No external circuit diagnosis is involved.