Displaying Flash Codes using the Scan Tool
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Install a scan tool and turn ON the ignition with the engine OFF. Locate the Body section in the scan tool, select cruise, and enable the diagnostics. This action pulls the cruise control module (CCM) terminal 10 to ground and signals the CCM to enter the FLASH DTC diagnostic display mode.