Call DEI?
I very well understand the diagram. The green on the 556 drops out hide a key when the regular key when inserted. The status is powering the keysense to the BCM so it thinks a key is in the ignition. The diode is so that the status does not backfeed the 556 (this has nothing to do with the BCM) thus prematurely shutting ioff the remote start.
We never asked the OP if he even powered the keysense in the first place or what kind of bypass (model) he used. Some do not have a function to drop the out when a key is inserted in the ignition lock cylinder. If the OP's bypass does not have this feature he needs to get one that does.
I will fully agree with the picky nature of the PK3 system. Most cars give no grief whatsoever even with no connection to the keysense at all.
