Operation CHARM
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Buick
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1987
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Skylark V6-181 3.0L
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Scan Tool Testing and Procedures
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Function Selector Positions
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EGR Position
EGR Position
Indicates position of
EGR valve
pintle as voltage reading. Normal reading is 0.3-2.0 volts.