On the 94 it is plug located to the left of the steering column under the dash You can also check the codes by turning the ignition On and OFF,ON and OFF then finally ON and watch for the flashes of the CHECK ENGINE LIGHT: a LONG flash is the first number and SHORT flashes are the second number, Example 23 would be Two long flashes and Three short flashes. You may repeat the on and off to be sure you get it right. There may be multiple codes so have pen and paper in hand.
With a scan tool.With a scan tool.
With a scan tool.
With a scan tool.
That requires a scan tool.
With an OBD2 scan tool.
Scan tool or battery disconnect.
A scan tool is required.
It requires a scan tool.
That requires the dealers scan tool.
Scan tool or battery disconnect.
With a scan tool after repairing the code that turned it on.With a scan tool after repairing the code that turned it on.
The only proper way is with a scan tool.