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Home >> Buick >> 2017 >> Envision Preferred, AWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P305D or P305E: DC/DC Converter Crank Control >> Circuit/System Description

Circuit/System Description

The power supply transformer is used to boost battery voltage to sensitive loads during engine restart. It provides two voltage outputs that provide the boosted voltage. The power supply transformer communicates to the ECM, and sends to the ECM the state of the crank control input.

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