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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2153 (Security Control System) >> System Description >> Vehicle Security System >> Component Description
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Component Description

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT DESCRIPTION CHART

Item Function
BCM Verifies the received signal from ignition key, then informs ECM whether to allow engine start.
Door switch Provides the BCM with the status of each monitored door.
Security indicator Indicates the status of the security system.
IPDM E/R Controls the horn and headlamps operation.
Horn Sounds when the vehicle security system is triggered.
Driver door key cylinder switch Capable of locking all doors and setting the alarm, unlocking all doors and resetting the alarm.
Back door key cylinder switch Capable of locking all doors and setting the alarm, unlocking all doors and resetting the alarm.