Operation CHARM
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GMC Truck
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1989
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Safari Van M L4-151 2.5L
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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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WOT - Wide Open Throttle Switch
WOT - Wide Open Throttle Switch
SCAN displays on/off status of
WOT switch
as sensed by ECM. Switch should be on when throttle is in wide open position.