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Buick
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1999
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Century V6-3100 3.1L VIN M SFI
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Description and Operation
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PCM Controlled Warning Lamps Description
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General Description
General Description
The MIL is the only lamp that is controlled directly by the
PCM
, all other indicator lamps/gauges are controlled by the
BCM
, or the IPC. Refer to Body and Accessories to diagnose these items.