Operation CHARM
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Geo Truck
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1991
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Tracker 4x2 L4-1590cc 1.6L
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Repair and Diagnosis
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Powertrain Management
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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
Engine Control Module
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Description and Operation
Locations
Diagrams
Specifications
ECM Circuit Resistance Check
ECM Pinout/Terminal ID Charts
Technical Service Bulletins
