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Diagnostic Aids

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

A new replacement PCM will be in a functional state to learn the password from the BCM. If the BCM is replaced, the PCM must be placed in password learning mode to relearn a new password. Once learned, the password becomes permanent information that remains with the vehicle. The loss of PCM battery or ignition voltage will not affect the programmed password information.

DTC P1630

Step Action Yes No
1 Did you perform the Theft Deterrent Diagnostic System Check? Go to Programming Theft Deterrent System Components  Go to Diagnostic System Check - Theft Deterrent 
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