Originally Posted by
karbun
Thanks for this. That was my hypothesis. Going to check out the other ideas first just to be sure, but I thought it meant something that disconnecting the battery would allow for 1-3 start attempts.
Only question about this -- previously skreem probablems also kept the key from unlocking the car remotely, and were associated with alarm going off. Is that not always the case with the skreem issue? Does the key still sometimes work remotely, just not to start the car?
Kara
YES.
There are two halves to the SKREEM.
One is powered by the battery via fuse 35. This part is always "on" and is the "Security System" part that operates the 300mHz receiver and listens for the FOB's signal, when it hears that signal, it tells the BCM to tell the Locking pump to either lock the doors and set alarm or unlock doors and disable the alarm.
The other half is powered by ignition switched power via fuse 37. This part is powered up when you turn the key to "ON" and is the "Start Enable" part that performs a very fast handshake with the RFID chip in the key FOB as well as the start enable part of the ECU.
Either half can fail.