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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Seat Belt System) >> Diagnostic Information and Procedures >> Seat Belt Indicator Malfunction - Driver >> 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 vehicles equipped with the driver and passenger air bags, the driver seat belt switch will supply a ground for the seat belt indicator when the seat belt is unbuckled causing that indicator to illuminate.

For vehicles equipped with the driver air bag only, the driver seat belt switch supplies a ground to the SDM when the seat belt is buckled. When the driver is unbuckled, the seat belt switch opens removing the ground to the SDM. The SDM will then supply voltage to the seat belt indicator which will then cause that indicator to illuminate.

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