Vehicle Theft Security System (VTSS)

VEHICLE THEFT SECURITY SYSTEM
The Vehicle Theft Security System (VTSS) is part of the Body Control Module (BCM) and is designed to protect against whole vehicle theft. The system monitors vehicle doors, hood, liftgate, and the ignition for unauthorized operation. The alarm activates by:
- Sounding the horn
- Flashing the park and tail lamps
- Flashing the headlamps
- Flashing the VTSS indicator lamp

The VTSS does not prevent engine operation; this is done with the Sentry Key Immobilizer Module (SKIM).

The VTSS indicator lamp will flash for approximately 15 seconds during the arming process. If there is no interruption during the arming process, upon completion, the VTSS indicator lamp will flash at a slower rate.

When the BCM receives an input to trigger the alarm, the BCM will control the outputs of the headlamps, horn, and VTSS lamp for approximately 15 minutes. If BCM determines the threat to be false and the VTSS is not triggered again, the system will shut down and rearm itself after 3 minutes. If a trigger is still active, the alarm will continue for an additional 15 minutes without the horn. The VTSS monitoring portion of the system is split into two sections. The engine compartment section and the passenger compartment section. If a malfunction occurs in the engine compartment section, the passenger compartment section would still arm and function normally.

NOTE: If hood is not secure during the arming sequence, the lamp will stay lit and not flash. The system will arm with hood not secured (hood ajar switch closed) and the liftgate open (liftgate ajar switch closed). System will not arm if passenger compartment is not secure (all switches closed)

The VTSS does not prevent engine operation; this is done with the Sentry Key Immobilizer Module (SKIM).

Upon failure of proper SKIM communication to the PCM, the PCM will shut OFF fuel after 2 seconds of run time. The engine will not re-crank on the key cycle that the failure occurred, a full key down sequence must be performed for the engine to crank again. After six consecutive fuel shut-offs, the engine will no longer crank on subsequent key cycles. The failure must be corrected and a valid communication process between the SKIM and the PCM must occur for the engine to crank and start again.

Arming (Active and Passive)
The electronics for the VTSS are part of the Body Control Module (BCM). Active arming occurs when the ignition key is removed, the RKE transmitter or door key cylinders are used to lock the vehicle doors, whether the doors are open or closed. The arming process is complete only after all doors are closed.

Passive arming occurs when the ignition key is removed, the driver door is opened, and the doors are locked with the power door lock switch, and the door is closed.

For vehicles equipped with SKIS, the doors do not have to be locked to enable the fuel shut OFF feature.

After the vehicle is locked and the last door is closed, the set LED indicator in the top cover will flash quickly for 16 seconds, indicating that arming is in progress. If no monitored systems are activated during this period, the system will arm. The LED will extinguish unless the liftgate is open. If the liftgate is open, the LED will flash at a slower rate.

This indicates that the system is armed. If fault is detected on any key cylinder input, the indicator LED will remain solid during the arming process, although the system will still arm. If the indicator LED does not illuminate at all upon door closing it indicates that the system is not arming.

Disarming (Active and Passive)
Active disarming occurs when the RKE transmitter is used to unlock the vehicle doors. This disarming will also halt the alarm once it has been activated.

Passive disarming occurs upon normal vehicle entry by unlocking either door with the ignition key or remote transmitter. This disarming will also halt the alarm once it has been activated.

Tamper Alert
A tamper alert exists to notify the driver that the VTSS had been activated. This alert consists of 3 horn pulses when the vehicle is disarmed.

The VTSS tamper alert will sound the horn three times upon disarming after an initial alarming has occurred to indicate a tamper condition has occurred.

Manual Override
The VTSS will not arm if the doors are locked using the manual lock control or if the locks are actuated by an inside occupant after the doors are closed.

Diagnosis
For complaints about the Vehicle Theft Alarm triggering on its own, use the DRB III and read the Last VTSS Cause status.

ARMING AND TRIGGERING THE VTSS

Arming The VTSS - Method A
1. With the key removed from the ignition lock and any door open (excluding liftgate), actuate one of the following:
- Power door lock button to LOCK,
- Key fob LOCK button
- Door lock key cylinder to locked position.
2. Close all opened doors. Liftgate can remain open.
3. After the last door is closed, an arming timeout period of 16 seconds will start, then the VTSS will become armed.

Arming The VTSS - Method B
Actuating the key fob transmitter LOCK button, key locking the front doors with the doors closed and the ignition locked will begin the arming time-out period. If method A, 16 second time-out sequence was in process when method B was actuated, the 16 second time-out will restart from the time of the second actuation.

If the security lamp does not illuminate at all upon final door closure, it indicates that the system is not arming.

The current VTSS status armed or disarmed shall be maintained in memory to prevent battery disconnects from disarming the system.

Triggering The VTSS
After the VTSS is armed, the following actions will trigger the alarm:
- Opening any door (excluding liftgate).
- Opening the hood
- Turning the ignition to the ACC, or UNLOCK position.

NOTE: When the VTSS is ARMED, the interior power door lock switch "UNLOCK" will be disabled until the vehicle is disarmed.

CAUTION: The VTSS indicator LED will trigger and engine will continue to run if the vehicle is equipped with SKIS and the proper key is used to start the vehicle. This condition will occur if the VTSS has been triggered. If valid key is used, VTSS will disarm