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Home >> Cadillac >> 2001 >> DeVille Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Anti-Theft System >> Diagnostic Tests >> DTC B3031: Key Decoder Device In Assembly Learn Mode >> Circuit Description
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Circuit Description

Theft deterrent control module checks memory to see if LEARN CODED KEY setting is on. If so, theft deterrent control module sets DTC B3031.

DTC sets when, LEARN CODED KEY setting is on, theft deterrent control module sets this DTC.

When DTC sets, theft deterrent control module will learn key code. SECURITY indicator will be illuminated for this DTC.

Theft deterrent control module clears current status of DTC when it sees that LEARN CODED KEY setting is not on. DTC will still be retrieved as current until ignition switch is cycled. DTC will become a history DTC at that time.