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Pontiac
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1999
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Firebird 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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Scan Tool Testing and Procedures
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Scan Tool Data Definitions - Powertrain Systems
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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 the ignition feed circuit.