Circuit Description

The Vehicle Theft Deterrent (VTD) system is incorporated within the BCM. If the BCM has been replaced, the password must be relearned using special equipment. If PCM is replaced, the replacement PCM should relearn the password within a few seconds after ignition is turned on. Engine will start and continue to run with DTC P1630 set. See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.

DTC will set when VTD system has allowed fuel delivery, PCM is theft deterrent password learn mode and PCM remains in theft deterrent password for greater than 2 seconds.