Changing the Passlock (TM) Components

The design of the passlock(TM) system is to prevent theft even if the various theft deterrent parts change. The parts that can no longer be changed without the possibility of going into a tamper mode are:
^ The passlock(TM) sensor
^ The EVO/Passlock (TM) module
^ The VCM/PCM

If you replace any of these parts the vehicle may start and stall for 10 minutes. This is the long tamper mode. If this occurs, the system must go through a long tamper mode cycle. During this time the SECURITY indicator will be flashing for the full 10 minutes and the DTC B3031 will be set. The EVO/Passlock (TM) module and the VCM/PCM require the full 10 minutes in order to complete a learn cycle. The ignition switch must remain in the RUN position until the SECURITY indicator stops flashing. You will need to repeat the cycle if the ignition switch does not remain in the RUN position. When replacing any of the above parts it is recommended to perform one of the following procedures:
^ Seed and key Procedure. Refer to PASSLOCK Reprogramming Seed and Key (10 minutes). Testing and Inspection
^ Auto Learn Procedure. Refer to PASSLOCK Reprogramming Auto Learn (30 minutes). Testing and Inspection