LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 715 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTC B3031: BCM Is In Learn Mode But Does Not See A Valid Passlock™ Sensor Code >> Circuit Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit Description

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

When a body control module (BCM) is replaced, it must be programmed to accept the analog voltage signal code of the existing Passlock™ sensor. When the BCM is replaced, the service replacement BCM is programmed to accept the first Passlock™ code it detects. If the BCM is unable to detect a valid Passlock™ code, the BCM will never end the programming sequence and B3031 will continue to be set as current.

In this mode, the body control module (BCM) will learn the current Passlock™ sensor code value.

scientia non olet · About LEMON Manuals