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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Theft Deterrent System) >> Diagnostic Tests >> DTC B3031: Controller In Learn Mode >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Prior to replacing a Passlock(tm) module, ensure that all diagnostics have been completed. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table. If DTC is a history DTC, problem may be intermittent. Perform tests while wiggling wiring. Inspect Passlock(tm) sensor harness for intermittent or poor connections.

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