Operation CHARM
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Jaguar
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1991
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Sovereign L6-4.0L
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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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Overrev Protection
Overrev Protection
PURPOSE
To prevent engine damage from over revving.
OPERATION
ECM cancels fuel metering (injector operation) when it detects
crankshaft sensor
input 6300 rpm.