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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Electrical >> Body Electrical >> Hybrid/EV System Controls >> Diagnostic Information and Procedures >> Drive Mode Select Switch Malfunction >> Circuit/System Description

Circuit/System Description

The body control module (BCM) monitors the state of the drive mode select switch. The BCM sends the drive mode select switch signal message to the ECM over the serial data circuits. The ECM uses this message to determine the following driver selected mode of operation:

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