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GMC Truck
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1999
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Savana 1 Ton Van V8-454 7.4L VIN J SFI
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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, Normal Values and Definitions
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Scan Tool Data Definitions - Powertrain Systems
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Knock (KS) Sensor Activity
Knock (KS) Sensor Activity
Range (0-255 Counts)
The
Knock Sensor
Activity will display a randomly fluctuating number between 0 and 255 when the
VCM
detects spark knock. This random number will be unchanging when no knock is present.