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Home >> Chevrolet >> 1999 >> Corvette V8-5.7L VIN G >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Vehicle On-Board & Scan Tool Diagnostics >> Engine Scan Tool Data Definitions >> Air Pump Relay

Air Pump Relay

The scan tool displays On or Off. When the PCM grounds the AIR pump relay control circuit, the scan tool indicates ON. When the PCM disables the ground circuit, the scan tool indicates OFF.
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