Operation CHARM
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Dodge or Ram Truck
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1993
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W 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 and Outputs
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Tachometer Output
Tachometer Output
This signal generated by the PCM based upon the
engine speed sensor
signal, is used to drive the tachometer when equipped.