Pacifica V6-3.8L VIN L (2005)
Security Lamp/Indicator: Description and Operation
The Sentry Key Immobilizer System (SKIS) uses an indicator light to convey information on the status of the system to the customer. This light is shared
with the Vehicle Theft Security System (VTSS). The light is located in the instrument panel switch pod, just to the right of the cluster. The indicator light
is controlled by the Body Control Module (BCM), via Programmable Communication Interface (PCI) data bus communication with the cluster, based
upon messages it receives from the Sentry Key Remote Entry Module (SKREEM) on the PCI data bus, and is hard wired to the cluster.
The VTSS/SKIS lamp is controlled according to Sentry Key Remote Entry (SKREEM) messages. Then, the SKREEM sends messages to the BCM to
operate the light based upon the results of the SKIS self tests. The light may be actuated in two possible ways, flashing or on solid. If the light comes on
and stays on solid after a power-up test, this indicates that the SKREEM has detected a system malfunction. If the SKREEM detects an invalid key when
the ignition switch is moved to the ON position, it sends a message on the PCI bus to the BCM, to flash the light. The SKREEM can also send a message
to flash the light and generate a single audible chime at the same time. These two events occurring simultaneously indicate that the SKIS has been placed
into the "Customer Learn" mode. If the light comes on and stays on after the power-up test, diagnosis of the SKIS should be performed using a
DRBIII(R) scan tool and the appropriate Body Diagnostic Procedures manual. The light is not a serviceable component.