Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Scan Tool Data Definitions



SCAN TOOL DATA DEFINITIONS

8-Digit GM Part Number: The scan tool displays an 8 digit numeric number. The part number of the module.

Calibration ID: The scan tool displays 0-9999. The number designating what calibrations the module contains.

Julian Date of Build: The scan tool displays 0-999. The day of the year that the module was built.

New VIN Counter: The scan tool displays 0-99. The number of times a new VIN number has been set in the radio.

PROM ID: The scan tool displays 0-9999. The identification number of the modules internal PROM.

Signal Strength: The scan tool displays the strength of the received signal in dB.

Year Module Built: The scan tool displays a 1990- 2020, the production year the module was manufactured.