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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B144B: Run/Crank Power Relay Circuit >> 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.

The body control module (BCM) controls the ignition main relay through the control circuit by applying voltage to the ignition run/crank relay coil control circuit. The ignition main relay is energized when the ignition is in the RUN or the CRANK position, or when a remote start is requested

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