Antitheft Signal: Description and Operation

In order for a anti-theft protected vehicle to run, a password is communicated between the Instrument Panel Cluster (IPC) and the PCM. If a PCM is replaced, the new PCM needs to learn the correct password of the vehicle. If the new PCM is installed the EEPROM is flashed into the new PCM and the vehicle will learn the new password upon initial ignition "ON." If the IPC is replaced, the PCM needs to learn the new password from the IPC. The Password Learn Procedure is:

1. Attempt to start vehicle, then leave the ignition "ON." The "ANTI-THEFT" telltale will flash for 10 minutes.
2. Once the "ANTI-THEFT" telltale stops flashing, start the vehicle. Once the vehicle is running the password is learned.