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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 >> Liftgate Release 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: Rear Hatch/Gate Description and Operation 

Circuit Description
B+ - Relay Switch Supplied from a fuse.
Signal The control module input circuit has an internal resistance connected to 12 V.
Control - Component The output circuit is switched to 12 V to activate the component.
Control - Relay Coil The output circuit is switched to 12 V to activate the component.
Control - Relay Coil The output circuit is switched to ground to activate the component.
Ground - Component Chassis Ground
Component Description
S46 Liftgate Handle Switch When the switch is activated, the signal circuit to the control module is grounded.
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.
X50A Fuse Block - Underhood The fuse block houses various fuses and relays.
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
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