Operation CHARM
: Car repair manuals for everyone.
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Dodge or Ram Truck
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1991
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D 250 Pickup L6-359 5.9L DSL
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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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Description and Operation
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Functional Operation
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Inputs
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Ignition Circuit Sense
Ignition Circuit Sense
This input informs the engine controller that the
ignition switch
has been turned to the RUN position.