Using your ohmmeter check for resistance between terminal number 6 and terminal number 14. Do these resistance checks with the 12 V battery disconnected. You should have no resistance to ground and no resistance to the 12 V battery terminal in this connector. The resistance on the high-speed can network needs to be approximately 62 ohms. This is the high-speed can system and battery voltage and ground pins. I will give you the pin out diagram click the link and check the resistance of the pins indicated. The fact that the immobilizer system is not coming on would explain why your scan tool will not communicate with the system because is not coming online. By that I mean the dealership has to erase the memory in the computer and then rewrite new codes to new keys. The system has to be completely rewritten when you have no functioning keys. At this point you're probably going to need to take this to the dealer and have a new key programed to it. Making sure that those that are supplied with battery voltage KEY OFF have power to them. Now you could have a power supply problem to the immobilizer system the only way to rule that out is to check for voltage at every fuse in the fuse block under the hood and the fuse block inside the vehicle. Without having the key working so that the immobilizer system will allow the vehicle to turn on this will not start. The only way to override the system is to have a scan tool that will communicate with the immobilizer system to program a key and that typically can only be done at the dealership. If that's the only key that you have this is a problem. This could be a problem in the immobilizer system or the key fob itself could be bad. That flashing security light on the instrument panel even after the key is placed into the slot on the dashboard indicates that the immobilizer system is not recognizing that key fob.
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