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Home >> Chevrolet >> 2021 >> Equinox LS, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P171A-P171C >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Electronic Component Description

Circuit Description
Ignition Supplied from a fuse.
Control The output circuit is switched to ground to activate the component.
Component Description
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
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.
B280 is part of the component: Automatic Transmission Auxiliary Fluid Accumulator

The solenoid valve directs pressurized fluid to exit the accumulator to apply the clutches for a 1st gear start, during an Auto Start event.

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