Operation CHARM
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Pontiac
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1999
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Grand AM V6-3.4L VIN E
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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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Body Control System
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Gauge Control
Gauge Control
The
Body Control Module
(
BCM
)
receives Class 2 serial data messages from the
Powertrain Control Module
(
PCM
)
to determine the following gauge information:
^
Engine coolant temperature
^
Fuel level sensing