Driver's Door Does Not Trip VTSS

Connect scan tool to Data Link Connector (DLC), under lower left side of instrument panel. Using scan tool, read DRVR DOOR AJAR SW status. Open driver's door. If scan tool displays DRVR DOOR AJAR SW as CLOSED, replace CTM. See CENTRAL TIMER MODULE  under REMOVAL & INSTALLATION. If scan tool does not display DRVR DOOR AJAR SW as CLOSED, go to DRIVER'S DOOR AJAR CIRCUIT OPEN  under DOOR AJAR SYSTEM.