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Home >> Chevrolet >> 2002 >> 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

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