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Home >> Cadillac >> 1996 >> Seville SLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1630 - Theft Deterrent System Pcm In Learn Mode >> Circuit Description
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Circuit Description

This test checks for the enable password learning flag indicating the PCM is in learn password mode. This mode allows the PCM to learn the password from the VTD controller at assembly or when being serviced. The password needs to be learned whenever PCM or IPC is replaced.