Operation CHARM
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Oldsmobile
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1987
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Cutlass Ciera V6-231 3.8L
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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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Testing and Inspection
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Scan Tool Testing and Procedures
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Positions
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MPH/VSS
MPH/VSS
Displays vehicle speed by sensing pulses transmitted to the ECM from the
vehicle speed sensor
.