Operation CHARM
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Saab
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1987
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9000 L4-1985cc 2.0L DOHC
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Relays and Modules - Ignition System
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Ignition Control Module
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Description and Operation
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Ignition Control Module: Description and Operation
The ECU amplifies and converts the ignition pulse from the distributor. The pulse is then able to be used for controlling the ignition coil. In addition, the ECU controls the dwell angle.