Operation CHARM
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GMC Truck
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1987
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Jimmy Full Size V8-350 5.7L
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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
Modes of Operation
Acceleration Mode
Battery Voltage Correction Mode
Clear Flood Mode (Port and TBI Injection)
Deceleration Mode
Electronic Spark Timing (EST)
Run Mode
Starting Mode (Port and TBI Injection)
Throttle Body Fuel Injection
Testing and Inspection
Chart C-9A - ECM QDR Check Procedure
Checking Control Module For Bad Solder Joints
Service and Repair
Diagrams
Specifications
Technical Service Bulletins
