Operation CHARM
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Dodge or Ram Truck
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1994
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Caravan V6-201 3.3L
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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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On-Board Diagnostic System
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On-Board Diagnostic System (CNG)
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Inputs and Outputs
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Tachometer Output
Tachometer Output
Supplies engine speed (RPM), information to the instrument panel tachometer.