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Chevrolet
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1999
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Tracker 2WD L4-2.0L VIN C
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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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Engine Speed
Engine Speed
The scan tool range is
0-10,000 RPM
. The
PCM
computes engine speed from the ignition reference pulses. The engine speed should remain close to desired idle under various engine loads with the engine idling.