cheking the daignose troublshoots device located on 1990 Volvo 760

im looking for my volvo 760 model 1989 diagnose troubleshoots device place in the car

2 answers
located in the center console on the right side of thr emergency brake level. there is a pop up tab. use a flat head screwdriver to pop this tab out
In the engine compartment, looks like this: http://volvospeed.com/CheckEngine.php