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SOLVED! calling this one case closed! picked up a used tranny controller EGS and disconnected battery plugged in used module and wam started right up! unreal. we pulled our hair out on this one! but the bmw tech and us were on the right page and knew the issue was all pointing to the trans ecu.. has internal fault on that circuit which is probably a bad solder joint not sure yet.. but the used one was 100$ vs 1200 and it was plug and play. still think hotting the blue wire with the orange L2 outside the box would of bypassed all this and fixed it but didnt wanna create a draw wanted it done right. if it was my own car i would of jumped that wire!
the dealer did say the tranny computer had corrosion internally and on the pins so it was on its way out just happened to go when were were doing the Timing chains! same for the immobilizer it was original 14 yrs old with a beat key so must be from having battery unhooked doing the T chain job and hooking back up the modules were so old and beat they couldnt handle it. guesss for the sake of the car better now then on the side of the road cause they were going no matter what! UGGGGG Nightmare X5!!
if anyone ever has this issues where PRNDL tests perfect and only the immobilizer is reading p/n then chances are the controller is not sending the L2 orange wire power to the blue wire heading to the EWS immobilizer and not hotting the internal relay to create the magnetic pull to power everything up! almost positive juming the L2 orange outside the tran ecu to the blue wire going to immobilizer would bypass the trans ecu and make the car function 100% but im not certain that's and educated guess at this point!
thanks to all who gave input and suggestions this is a great site! everyone kept it professional and stayed on topic! thanks Again! BTW im Hulk40x5 Mechanic on this job not him.. point being he might not know schematics and diag like this!
again thank you all! hoping this thread goes down in history!
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08-06-2016, 09:39 AM
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