Use the Scan Tool Data Display Values and Definitions information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data with the typical data display value table information. Use the information to aid in understanding the nature of the problem when the scan tool data does not match the typical data values.

The scan tool data values were taken from a known good vehicle under the following conditions:

Calibration ID: This information refers to how the body control module (BCM) is calibrated. This information is for assembly plant use only.

Ignition 0 Input: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the ON or ACCY position.

Ignition 1 Input: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the ON or CRANK position.

Ignition 3 Input: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Run position.

Key in Ignition: This information refers to whether or not the ignition key is inserted into the ignition switch. The BCM uses this data to perform chime functions. YES is displayed when the key is inserted into the ignition switch.

Last 4 Dig of GM Part No.: This information refers to the last 4 digits of the GM BCM part number that is currently in the vehicle.

Last 4 Digits of SDM Part Number: This is the last four digits of the vehicles supplemental inflatable restraint (SIR) sensing and diagnostic module (SDM) part number.

Year Module Built: This information refers to the year that the BCM was built.