Operation CHARM
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Oldsmobile
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1994
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Eighty-Eight Royale FWD V6-3800 3.8L
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Repair and Diagnosis
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Instrument Panel, Gauges and Warning Indicators
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Testing and Inspection
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Component Tests and General Diagnostics
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Circuit Operation - Gauges Cluster
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Temperature Display
Temperature Display
The instrument cluster receives engine coolant temperature data from the Powertrain Control Module
(PCM)
over the serial data link. Engine coolant temperature is then displayed to the driver by an air core display.