Scan Tool Data Definitions

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.

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

Ignition 3:  Input to the control module from the ignition switch indicating the Ignition 3 position. Switch closed (HOT) in ignition switch position ON.

Key In Ignition:  Input from ignition switch indicating that the ignition key is inserted into the ignition switch. HOT with key in ignition switch.

Module Part Number:  Indicates the module part number.

Seed and Key Timer:  Indicates the time remaining for programming functions.

Software Part Number:  Part number of component program or the ECU. Used to determine applicability to vehicle RPO content.