Scan Tool Data Definitions

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Battery Voltage: The scan tool displays 0.0-16.0 volts. The battery voltage input represents the system voltage measured at the BCM ignition feed input.
GM Part Number: The module's part number.
Ignition Accessory: Input from ignition switch Accessory circuit. Used to determine power mode. Hot in ACC and ON.
Ignition 0: Input to the control module from the ignition switch indicating the Ignition 0 position. Switch closed (HOT) in ignition switch positions UNLOCK, ACC, ON, and START
Ignition 1: Input to the control module from the ignition switch indicating the Ignition 1 position. Switch closed (HOT) in ignition switch positions ON and START
Key in Ignition: Input from ignition switch indicating that the ignition key is inserted into the ignition switch. HOT with key in ignition switch.
Julian Date of Build: The day of the year when module was built.
SWC Switch Power: Indicates the state of the supply voltage to the steering wheel controls supply voltage.
SWC Switch Voltage: Indicates the steering wheel controls supply voltage.
Year Module Built: The year when module was built.