Driver's Door Key Fails To Disarm VTSS

Using scan tool, select THEFT ALARM, VTSS, then SENSORS. Read DRV KEY CYL SW volts. Rotate key in door key cylinder from normal position to unlock position. If voltage changes from 5.0 to 1.6 volts, go to next step. If voltage does not change from 5.0 to 1.6 volts, go to step 3 .
Remove and install Power Distribution Center (PDC) fuse No. 12 to reset door module. See Figure and Figure . Retry VTSS. If system functions correctly, test is complete. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS. If system does not operate correctly, replace Driver's Door Module (DDM). See appropriate POWER WINDOWS article. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
Remove driver's door trim panel. Disconnect driver's door cylinder lock switch connector. Connect a test light between battery positive post and door cylinder lock switch connector terminal No. 2 (Black wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Black wire between ground and door cylinder lock switch. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
Disconnect Driver's Door Module (DDM) C1 connector. Connect a test light between battery positive post and DDM C1 connector terminal No. 10 (Light Green/Orange wire). See Figure . If test light illuminates, go to next step. If test light does not illuminate, repair short to ground in Light Green/Orange wire. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
Using DVOM, measure resistance of Light Green/Orange wire between DDM C1 connector terminal No. 10 and door cylinder lock switch connector terminal No. 1. If resistance is less than 5 ohms, replace driver's door lock cylinder switch assembly. If resistance is 5 ohms or greater, repair open in Light Green/Orange wire. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.