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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC P0961, P0962, Or P0963: Line Pressure Control Solenoid Valve >> Circuit/System Description

Circuit/System Description

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
Q27A Pressure Control Solenoid Valve 1 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.
  • The solenoid valve control pressure decreases with increasing current.
  • The solenoid valve control pressure is high with minimum current.

Q27A is part of the component: Q8 Control Solenoid Valve Assembly

No external circuit diagnosis is involved.

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