Operation CHARM
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Oldsmobile Truck
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1990
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Silhouette V6-191 3.1L
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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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CCP - Canister Purge
CCP - Canister Purge
Display reads status of ECM command for
canister purge solenoid
. Reading of "on" indicates ECM signal to
solenoid
. On some systems, duty cycle is displayed from 0-100 percent.