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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Power Door Lock System And Vehicle Access System) >> Diagnostic Information and Procedures >> DTC B3140 or B3150 >> Circuit/System Description

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:Power Door Locks Description and Operation 

Circuit Description
Signal The control module input circuit has an internal resistance connected to 12 V.
Ground Chassis Ground
Component Description
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
S48A Multifunction Switch - Instrument Panel
  • The switch has a normally open contact.
  • When the switch is activated, the signal circuit to the control module is grounded.
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