Operation CHARM
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Isuzu Truck
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1999
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VehiCROSS 4WD V6-3.5L
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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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Fuel Metering System
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Fuel Metering System Modes
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Fuel Cutoff Mode
Fuel Cutoff Mode
No fuel is delivered by the fuel injectors when the ignition is
"OFF"
. This prevents engine run-on. In addition, the
PCM
suspends fuel delivery if no reference pulses are detected (engine not running) to prevent engine flooding.