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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.

The B18 Battery Current Sensor is a 3-wire hall effect current sensor. The K9 Body Control Module (BCM) supplies 5 V and ground to the Battery Current Sensor. The Battery Current Sensor measures the amount of current flowing to or from the battery, and supplies a Pulse Width Modulation (PWM) signal to the BCM.

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