FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Buick
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1999
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Riviera V6-3.8L SC VIN 1
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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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Commanded Fan 1
Commanded Fan 1
Scan Tool Displays ON or OFF. Represents the
PCM
commanded state of the fan 1 (low speed) control circuit.