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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Door Ajar Indicator Malfunction >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to: Door Ajar Indicator Description and Operation 

Circuit Description
Signal The control module input circuit has an internal resistance connected to 12 V.
Ground Chassis Ground
Component Description
B28 Door Ajar Switch The ajar switch opens when the body opening is fully latched close.
M74D Window Motor - Driver
  • Power Window Control
  • The control module also reads various switches and sensors and makes their values available via serial data.
M30 Liftgate Latch The DC motor unlatches the liftgate. Once the liftgate is unlatched, a switch in the latch will close, grounding the signal circuit to the BCM.
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
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