Circuit/System Description
WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. 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 - Terminal 1 @ B280 Automatic Transmission Accumulator Solenoid Valve | The output circuit is switched to 12 V to enable the component (s). |
| Control - Terminal 2 @ B280 Automatic Transmission Accumulator Solenoid Valve | The output circuit is switched to ground to activate the component. |
| Component | Description |
|---|---|
| B280 Automatic Transmission Accumulator Solenoid Valve | A solenoid valve is an electro-mechanically operated valve. The valve is controlled by an electric current through the solenoid. This is a normally closed valve that is controlled on/off. |
| K71 Transmission Control Module | The control module contains a microprocessor used to process input data to control outputs. The control module contains a microprocessor used to process input data to control outputs. 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. |
The solenoid valve directs pressurized fluid to exit the accumulator to apply the clutches for a 1st gear start, during an Auto Start event.