Operation CHARM
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Oldsmobile
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1989
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Calais L4-138 2.3L VIN A FI HP
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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
Testing and Inspection
Initial Inspection and Diagnostic Overview
Component Tests and General Diagnostics
Locations
Connector Views
Underhood Block View
Service and Repair
Diagrams
Specifications
ECM Pinout/Terminal ID Charts
Computer Command Control - Port Fuel Injection
Computer Terminal Voltage Values
ECM Connector Identification
Technical Service Bulletins
