I have 2006 buick rainier 4.2 with a no start no crank condition. After checking the starter relay everything seems good. The pcm is not grounding the starter relay circuit. Swapped pcm and same issue.
I have no communications to the pcm with tech 2. I also have no radio, hvac lights. Looking at wiring diagrams and possible fixes for the last couple of weeks has me puzzled. Everything seems to check out but i know i must be missing something stupid. Gounds on pcm connectors seem ok.
Can anyone provide some diagnostic info on where to look next. I've looked into both splice packs and have signals on most modules. I believe it pcm wiring related but i cant seem to find a trouble tree way of diagnosis for the U1016 code. Im usually pretty good with electrical diagnosis but dont have experience with class 2 communication, still learning.
Im going to check pcm c1 pin 13, 18, 19, and 20 for power after work. Any help is greatly appreciated since ive been researching way too much and am getting blinded by possible causes.
I have no communications to the pcm with tech 2. I also have no radio, hvac lights. Looking at wiring diagrams and possible fixes for the last couple of weeks has me puzzled. Everything seems to check out but i know i must be missing something stupid. Gounds on pcm connectors seem ok.
Can anyone provide some diagnostic info on where to look next. I've looked into both splice packs and have signals on most modules. I believe it pcm wiring related but i cant seem to find a trouble tree way of diagnosis for the U1016 code. Im usually pretty good with electrical diagnosis but dont have experience with class 2 communication, still learning.
Im going to check pcm c1 pin 13, 18, 19, and 20 for power after work. Any help is greatly appreciated since ive been researching way too much and am getting blinded by possible causes.