Operation CHARM
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Dodge or Ram Truck
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1992
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Caravan FWD L4-153 2.5L SOHC
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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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Inputs and Outputs
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Tachometer Output
Tachometer Output
PCM supplies engine RPM, information to the instrument panel tachometer, through the CCD Bus.