Operation CHARM
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Jeep Truck
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1991
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Wrangler L6-242 4.0L VIN S MFI
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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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SCI Transmit
SCI Transmit
The SCI transmit circuit is used as a communication path for the scan tool. The engine controller sends data to the scan tool through this circuit.