LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2002 >> Envoy 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Self-Diagnostics - 4.2L >> System Tests >> Malfunction Indicator Lamp Always On >> Description

Malfunction Indicator Lamp Always On: 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.