Originally Posted by
rayludwiczak
My understanding is that the key fob has a transponder that not only unlocks and locks the doors but also sends a signal to the security system allowing the ignition to become activated. It's part of the passive security system. Thanks for your response but I think you are wrong. Can anyone confirm that a weak key fob battery will not allow the vehicle to turn over and start?
Never argue with 180. If he does not know, he will tell you so.
Fact is, the battery in the FOB powers the transmitter that performs the unlock/lock and panic functions.
WHen you insert the key into the ignition, the passive TRANSPONDER is powered and signaled by the o-ring around the ignition switch.
Try this: take the battery out of the FOB - the buttons quit working, but the car WILL start.
From reading your posts, I would guess that the resoldering of the RCM fixed your car.