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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Malfunction (Driver Seat with Memory A45) >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to:Memory Seats Description and Operation 

Circuit Description
B+Terminal 1 X1 - K40D Seat Memory Control Module - Driver Supplied from a fuse.
B+Terminal 2 X1 - K40D Seat Memory Control Module - Driver Supplied from a fuse.
Signal - S64D Seat Adjuster Switch - Driver The control module input circuit has an internal resistance connected to 12 V.When the switch is closed it will pull the signal voltage low.
Control - Seat Motors The output circuit is switched to 12 V to activate the component.
Control - Seat Motors The output circuit is switched to ground to activate the component.
Ground - S64D Seat Adjuster Switch - Driver Chassis Ground
Ground - K40D Seat Memory Control Module - Driver Chassis Ground
Component Description
S64D Seat Adjuster Switch - Driver The assembly S64D has 4 switches.
K40D Seat Memory Control Module - Driver Depending on the version, the control module can support different functions:
  • Seat Motors
  • Adjustable Pedals
  • Outside Rearview Mirror

The control module also reads various switches and sensors and makes their values available via serial data.
M50D Seat Front Vertical Motor - Driver The motor M50D is a bidirectional DC motor that moves a seat.
M51D Seat Horizontal Motor - Driver The motor M51D is a bidirectional DC motor that moves a seat.
M55D Seat Rear Vertical Motor - Driver The motor M55D is a bidirectional DC motor that moves a seat.
M56D Seat Recline Motor - Driver The motor M56D is a bidirectional DC motor that moves a seat.