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Home >> Chevrolet >> 2001 >> Impala LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> System Tests >> Mil Inoperative >> Description
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Mil Inoperative: Description

Ignition voltage is supplied directly to Malfunction Indicator Lamp (MIL). Powertrain Control Module (PCM) turns MIL on by grounding MIL control circuit. There should be a steady MIL with ignition on and engine off.