Originally posted by pfphipps
[B]If you have the square connector, does it have a small pushbutton switch and an LED on it? I think it does and you can check the codes without anything else. If it does, turn the ignition on but do not start the car. Push the button and hold it for a couple of seconds and release. Any codes will flash back at you on the LED. No codes will give one short flash. [/
The built-in led/sw only brings up emmission codes and will trigger the check eng light.
The other codes are read with your tool on the other sockets. ISC/CC will be socket 14.