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Home >> Cadillac >> 1999 >> Escalade >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Anti-Theft System - Escalade, Express, Pickup, SAVANA, TAHOE & YUKON DENALI) >> Diagnostic Tests >> DTC B3031: Controller In Learn Mode >> Circuit Description

Circuit Description

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This DTC sets when ignition is active and Passlock™ key code has not been learned. This may be caused by installing a new module or sensor, or by a wiring problem that will not allow module to learn the new code. Vehicle will not start and SECURITY indicator light will remain on.

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