PT Cruiser L4-2.4L Turbo VIN G (2004)
Security Lamp/Indicator: Description and Operation
SKIS INDICATOR LAMP
The Sentry Key Immobilizer System (SKIS) uses the Vehicle Theft Security System (VTSS) indicator LED to give an indication when the SKIS is
faulty or when the vehicle has been immobilized due to the use of an invalid ignition key. The LED is controlled by the instrument cluster circuitry
based upon messages received from the Sentry Key Immobilizer Module (SKIM).
The SKIM sends messages to the instrument cluster, to turn the LED ON for about three seconds when the ignition switch is turned to the ON
position as a bulb test. After completion of the bulb test, the SKIM sends PCI bus messages to keep the LED OFF for a duration of about one
second. Then the SKIM sends messages to the instrument cluster circuitry to turn the LED ON or OFF based upon the results of the SKIS
self-tests. If the VTSS indicator LED comes ON and stays ON after the bulb test, it indicates that the SKIM has detected a system malfunction
and/or that the SKIS has become inoperative. If the SKIM detects an invalid key when the ignition switch is turned to the ON position, it sends
messages to the instrument cluster to flash the VTSS indicator LED.
The SKIM can also send messages to the instrument cluster to flash the LED and to generate a single audible chime tone. These functions serve as
an indication to the customer that the SKIS has been placed in its "Customer Learn" programming mode. See Sentry Key Immobilizer System
Transponder Programming in this group for more information on the "Customer Learn" programming mode.
The VTSS indicator LED uses a Light Emitting Diode (LED) on the instrument cluster electronic circuit board. It is not serviceable separate from
the instrument cluster assembly. If the VTSS indicator LED comes ON and stays ON after the bulb test function, diagnosis of the SKIS should be
performed with a DRB III(R) scan tool and the proper Powertrain Diagnostic Procedures manual.
