Operation CHARM
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Buick
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1987
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Electra Park Avenue V6-231 3.8L VIN 3 FI
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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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Fan
Fan
Monitors ECM command to engine cooling fan. Displays ``yes'' when ECM energizes fan relay. Indication should be ``no'' when coolant temperature is below 106°C.