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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Engine Control System - 3.8L (Troubleshooting & Diagnosis)) >> Troubleshooting >> Malfunction Indicator Lamp (MIL) Inoperative >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Ignition voltage is supplied to the malfunction indicator lamp (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit.