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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 347 (Battery, Starting System And Charging System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P156D >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
Component Description
T19 Multifunction Power Supply Converter Supplies DC to DC voltage to maintains a steady output voltage.

The device serves as a voltage stabilizer for several vehicle systems by compensating the voltage drop that the starter motor causes while starting the engine.

For an overview of the component/system, refer to: Stop/Start System Description and Operation

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