October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

DTC 12: Diagnostic System Check: Description

DTC 12 is always displayed as the first DTC, indicating Body Control Module (BCM) is in diagnostic mode and DTC display is in progress. If DTCs do not display, go to TESTING . If DTCs display, go to appropriate diagnostic procedure. See BCM DTC DEFINITIONS table under SELF-DIAGNOSTIC SYSTEM.