Operation CHARM
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Cadillac
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1998
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DeVille V8-4.6L VIN Y
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Relays and Modules - Computers and Control Systems
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Body Control Module
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Description and Operation
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SIR Deployment Unlock
SIR Deployment Unlock
When the
Body Control Module
(PZM)
receives notification through the serial data line that the air bags have been deployed. The PZM automatically unlocks all of the doors and turns on the interior lamps.