BCM - Conventional Ignition Switch
The BCM determines the vehicle ignition mode based on the ignition switch input. The BCM communicates the ignition mode to the other modules over the CAN . The BCM monitors the ignition switch input and the ignition mode outputs. If a fault is detected in the ignition system, Diagnostic Trouble Codes (DTCs) are set by the BCM .
Refer to: MODULE CONTROLLED FUNCTIONS - COMPONENT LOCATION .