Place the second key in the ignition lock cylinder or the backup starting location.Turn the ignition lock cylinder to the OFF position or press the START/STOP button and remove the first key.Turn the ignition lock cylinder to the RUN position or press the START/STOP button and wait approximately 6 seconds.Refer to: Passive Anti-Theft System (PATS) (419-01C). Place the first key in the ignition lock cylinder or the backup starting location. This step is only necessary if the BCM (body control module) is being replacedġ.Cary out the remaining steps only if installing a new BCM (body control module).Ģ.NOTE: A diagnostic scan tool should not be used to program keys for this specific step. NOTE: If the BCM (body control module) did not respond to the diagnostic scan tool, As-Built Data may need to be entered as part of the repair. If installing a new BCM, it must be programmed with as-built data for the vehicle it’s going into. Also, the BCM and PCM, and possibly the Instrument cluster must all be programmed to work together. It controls many many aspects of the car, like the keys, tpms, interior lighting, etc. Yes, you absolutely have to have the BCM dealer programmed. Reading conflicting info on the ole internet. Not sure if I need to program it so the keys and everything works.