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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 267 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTC P1630: PCM Remains In Theft Deterrent Password Learn Mode Too Long >> Circuit Description

Circuit Description

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

The vehicle theft deterrent system (VTD) is incorporated within the body control module (BCM). If the BCM has been replaced, the password must be relearned. If the powertrain control module (PCM) is replaced, the replacement PCM should learn the password within a few seconds after the ignition is turned ON. This is an information code indicating that the PCM is ready to learn the VTD password.

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