So we are trying to get a 2007 HHR to run on a 2010 ECM/TCM combo (yes we have a good reason for doing this)...and I have taken care of the wiring differences between the two, but we're not sure if the anti-theft is being disabled. It seems that the EFILive software says that a full re-flash must be performed (for a OS "patch"?), yet the software doesn't seem to allow us to do this...only the engine calibration data. We have checked the appropriate "disable VATS" boxes and re-programmed the 2010 ECM...the security lamp goes off but the starter will still not turn over. (and yes I am aware that both the starter relay and P/N switch signals are on different pins and changed polarity in 2008, this has been accounted for).
Is it a true statement that if that security light is out then VATS is unquestionably not causing a no crank/no start condition? Would there be anything else to account for other than VATS and the wiring differences introduced in 2008?
Thanks...we're pretty new with the EFILive software and still learning!
Bill