Quote:
Originally Posted by nico2193
I honestly have no idea... I have the USB cable but don't know what and how to do this..
I have no codes at all being thrown...
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Some codes will not show on your dash. It's a good practice to read for codes when you have issues. Sometimes we spend time trying to make sense of it when the car is telling us exactly what's going on.
USB/serial cable should be plugged to the JB4 at install time and routed to the glove box for easy access. At that point, you plug it to your laptop, run the JB4 interface and read the codes. plain and simple.
if your auto clear is on, then you won;t get any code because the JB4 will auto delete. it's always good to leave it off when debugging.
another not so friendly way to read the codes is through your dash and jb4 controls. if you haven't routed the JB4 cable and don;t feel like doing it:
http://www.n54tech.com/forums/showthread.php?t=11495