Security Lamp/Indicator: Testing and Inspection

The diagnosis found here addresses an inoperative Vehicle Theft Security System (VTSS) indicator condition. If the problem being diagnosed is related to indicator accuracy, be certain to confirm that the problem is with the indicator and not with an inoperative VTSS. (Refer to ELECTRICAL/VEHICLE THEFT SECURITY - DIAGNOSIS AND TESTING - VEHICLE THEFT SECURITY SYSTEM). If no VTSS problem is found, the following procedure will help to locate a short or open in the VTSS indicator control circuit. Refer to the appropriate wiring information.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE-CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Check the fused B(+) fuse in the Junction Block (JB). If OK, go to Step 2. If not OK, repair the shorted circuit or component and replace the faulty fuse.
2. Check for battery voltage at the fused B(+) fuse in the JB. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit between the JB and the Power Distribution Center (PDC).
3. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness connector for the automatic headlamp light sensor/ VTSS indicator from the automatic headlamp light sensor/VTSS indicator pigtail wire connector. Reconnect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the instrument panel wire harness connector for the automatic headlamp light sensor/VTSS indicator. If OK, go to Step 4. If not OK, repair the open fused B(+) circuit between the VTSS indicator and the JB.
4. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness connector for the JB from the JB connector receptacle. Check for continuity between the VTSS indicator driver circuit cavity of the instrument panel wire harness connector for the automatic headlamp light sensor/VTSS indicator and a good ground. There should be no continuity. If OK, go to Step 5. If not OK, repair the shorted VTSS indicator driver circuit between the VTSS indicator and the JB.
5. Check for continuity between the VTSS indicator driver circuit of the instrument panel wire harness connector for the automatic headlamp light sensor/VTSS indicator and the instrument panel wire harness connector for the JB. There should be continuity. If OK, replace the faulty VTSS indicator. If not OK, repair the open VTSS indicator driver circuit between the VTSS indicator and the JB.