FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Car repair manuals for everyone.
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1999
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Astro Van 2WD V6-4.3L VIN W
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Powertrain Management
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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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CMP Retard
CMP Retard
0 - 90 Degrees
The
CMP
Retard indicates a correction to the
CMP sensor
and the
CKP sensor
relationship caused by small tolerance variations or component misalignment.