Operation CHARM
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Jeep
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1997
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Grand Cherokee 4WD L6-4.0L VIN S
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Description and Operation
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Outputs
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Power Ground
Power Ground
POWER GROUND
The power ground is used to control ground circuits for the following
Powertrain Control Module
(PCM)
loads:
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Generator field winding
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Fuel injectors
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Ignition coil
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Certain relays/solenoids