yeah, I missed that part.P bus also loops through UEC to pick up a connection for AHL/AFL option. ECU and TCM are downstream (from CIM) of UEC on P bus. UEC does not communicate on P bus. That is on I bus.
Any thoughts on my question above?Oh, shoot. I forgot this is ME9. Options are limited for this ecu compared to T8 to Tech2 only IIRC. OP is correct about part #, etc.