problem with service abs and tcs message
28 TCS-No comm
99-hvac -no comm
every thing else is no codes
i cleaned all the ground points and took the pcm and check for bad wiring on the harness and opened the pcm to check for corrosion also did the same to the bcm,when abs and tcs light is on the hvac display is blank hence no ac after two min of car being on code clears up,ac works fine and no codes shows up in the diagnostic menu. Any help is appreciated to the what next to try.





