Operation CHARM
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Jaguar
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1989
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XJ-S V12-5.3L
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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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Ignition ECM
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Operating Modes
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Engine Starting
Engine Starting
Timing during cranking and start-up is chosen from an ECU program linked to engine speed sensor and coolant temperature sensor inputs.