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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.0L (LSY) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Relative Engine Compression Test >> Circuit/System Description

Circuit/System Description

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The Relative Engine Compression test monitors starter current draw to determine the relative compression of all cylinders. Each compression stroke causes mechanical resistance, increasing the current draw on the battery. Starter current and battery voltage are inversely proportionate.

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