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Chevrolet
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1999
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Corvette V8-5.7L VIN G
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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Vehicle On-Board & Scan Tool Diagnostics
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Engine Scan Tool Data Definitions
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Ignition 1
Ignition 1
The scan tool displays
0 - 25.5 volts
. The Ignition 1 represents the system voltage measured by the
PCM
at its ignition feed.