Operation CHARM
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Cadillac
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2001
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Seville STS V8-4.6L VIN 9
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Repair and Diagnosis
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Accessories and Optional Equipment
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Antitheft and Alarm Systems
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Description and Operation
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Content Theft Deterrent (CTD)
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Door Lock Cylinder Switch
Door Lock Cylinder Switch
The front door lock cylinders are equipped with switches in order to disarm the CTD system. When the lock cylinder is turned to the unlock position the switch grounds the disarm input to the Drivers Door Module
(DDM)
.