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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Battery, Charging System And Starting System - Except Hybrid) >> Diagnostic Information and Procedures >> DTC P15A3: Stop/Start Select Switch Circuit Signal Message Counter Incorrect >> Circuit/System Description

Circuit/System Description

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The engine control module (ECM) receives the stop/start switch speed signal via serial data from the body control module (BCM).