Dodge Dakota Sport 2001 Service Manual page 564

AN
VEHICLE THEFT SECURITY (Continued)
turned on with the driver side front door open. When
the VTSS is pre-armed, the arming sequence is
delayed until all of the doors have been closed.
Once the VTSS begins the passive or active arming
sequence, the security indicator in the instrument
cluster will flash rapidly for about seventeen seconds.
This indicates that the VTSS arming is in progress.
If the ignition switch is turned to the On position, a
door is opened, a door is unlocked by any means, or
the RKE "Panic" button is depressed during the sev-
enteen second arming process, the security indicator
will stop flashing and the arming process will abort.
Once the seventeen second arming sequence is suc-
cessfully completed, the security indicator will flash
at a slower rate, indicating that the VTSS is armed.
DISARMING
Passive disarming of the VTSS occurs when the
vehicle is unlocked using the key to unlock either
front door or, if the vehicle is equipped with the
optional Sentry Key Immobilizer System (SKIS), by
turning the ignition switch to the On position using a
valid SKIS key. Active disarming of the VTSS occurs
when the vehicle is unlocked by depressing the
"Unlock" button of the RKE transmitter. Once the
alarm has been activated (horn pulsing and head-
lamps flashing), either disarming method will also
deactivate the alarm. Depressing the "Panic" button
on the RKE transmitter will not disarm the VTSS.
POWER-UP MODE
When the armed VTSS senses that the battery has
been disconnected and reconnected, it enters its pow-
er-up mode. In the power-up mode the alarm system
remains armed following a battery failure or discon-
nect. If the VTSS was armed prior to a battery dis-
connect or failure, the technician or vehicle operator
will have to actively or passively disarm the alarm
system after the battery is reconnected. The pow-
er-up mode will also apply if the battery goes dead
while the system is armed, and battery jump-starting
is attempted. The VTSS will be armed until the tech-
nician or vehicle operator has actively or passively
disarmed the alarm system. If the VTSS is in the dis-
armed mode prior to a battery disconnect or failure,
it will remain disarmed after the battery is recon-
nected or replaced, or if jump-starting is attempted.
TAMPER ALERT
The VTSS tamper alert feature will sound the horn
three times upon disarming, if the alarm was trig-
gered and has since timed-out (about eighteen min-
utes). This feature alerts the vehicle operator that
the VTSS alarm was activated while the vehicle was
unattended.
VEHICLE THEFT SECURITY
OPERATION - SENTRY KEY IMMOBILIZER
SYSTEM
The Sentry Key Immobilizer System (SKIS) is
designed to provide passive protection against unau-
thorized vehicle use by disabling the engine after
about two seconds of running, whenever any method
other than a valid Sentry Key is used to start the
vehicle. The SKIS is considered a passive protection
system because it is always active when the ignition
system is energized and does not require any cus-
tomer intervention. The SKIS uses Radio Frequency
(RF) communication to obtain confirmation that the
key in the ignition switch is a valid key for operating
the vehicle. The microprocessor-based SKIS hard-
ware and software also uses electronic messages to
communicate with other electronic modules in the
vehicle over the Programmable Communications
Interface (PCI) data bus. (Refer to 8 - ELECTRICAL/
ELECTRONIC CONTROL MODULES/COMMUNI-
CATION - OPERATION).
Pre-programmed Sentry Key transponders are pro-
vided with the vehicle from the factory. Each Sentry
Key Immobilizer Module (SKIM) will recognize a
maximum of eight Sentry Keys. If the customer
would like additional keys other than those provided
with the vehicle, they may be purchased from any
authorized dealer. These additional keys must be pro-
grammed to the SKIM in the vehicle in order for the
system to recognize them as valid keys. This can be
done by the dealer using a DRBIII scan tool or, if
Customer Learn programming is an available SKIS
feature in the market where the vehicle was pur-
chased, the customer can program the additional
keys, as long as at least two valid Sentry Keys are
already available. (Refer to 8 - ELECTRICAL/VEHI-
CLE THEFT SECURITY - STANDARD PROCE-
DURE - TRANSPONDER PROGRAMMING).
The SKIS performs a self-test each time the igni-
tion switch is turned to the On position, and will
store fault information in the form of Diagnostic
Trouble Codes (DTC's) if a system malfunction is
detected. The SKIS can be diagnosed, and any stored
DTC's can be retrieved using a DRBIII
Refer to the appropriate diagnostic information.
DIAGNOSIS AND TESTING - VEHICLE THEFT
SECURITY SYSTEM
The Vehicle Theft Security System (VTSS)-related
hard wired inputs to and outputs from the Central
Timer Module (CTM) may be diagnosed and tested
using conventional diagnostic tools and procedures.
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
8Q - 3
scan tool.