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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P156D: DC/DC Converter Ignition Switch Run/Start Position Signal Message Counter >> Circuit/System Description

Circuit/System Description

The DC/DC converter provides continuous power to certain devices during a stop start event to achieve uninterrupted performance during engine cranking. The ECM monitors the ignition status of the DC/DC converter during start stop events.

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