I believe that you might be asking about the location of the plug to the OBD (On-Board Diagnostic) computer. If so, on that model I BELIEVE it can be found hidden under the right hand side of the center floor console.
OR - you can simply PHONE your local Honda delaer and ASK them.
A code reader, is a device that downloads the alpha-numeric codes from the OBD which can be looked up to identify what faults the computer is reading.
where is the plug to conect the code reader on a 1990 Honda accord
Look under the driver side dash, near the front. You will see the plug there.
In order to use a code reader on a 1992 Dakota simply plug it into the DLC outlet. From there, the code reader should properly function.
take out the cup holder in the center console next to the parking brake. it should be right under there.
Under the left side of the dashboard just above and to the right of the hood latch.
The OBD 2 plug is located under the dash on the driver side.
The plug-in for a code reader on a 1990 Dodge Dakota is located under the hood along the firewall.
The OBD plug is concealed under the right side of the center console plastic trim .
In a 2002 Honda CR-V, you can plug the code reader into the OBD-II (On-Board Diagnostics II) port, which is typically located under the dashboard, near the driver's side. Look for it near the steering column, above the brake pedal. The port is usually a 16-pin connector, and you may need to remove a cover or panel to access it. Once connected, you can use the code reader to retrieve diagnostic trouble codes from the vehicle's computer.
In a 2004 Volvo XC90, you can plug in the code reader into the OBD-II diagnostic port, which is typically located under the dashboard on the driver's side. Look for a small, rectangular connector that is usually found near the steering column or just above the brake pedal. Make sure the vehicle is turned off before connecting the code reader. Once connected, you can turn the ignition to the "on" position to read the codes.
The same OBD II reader that gave you the Oxygen Sensor code can be used to clear that code. Repair the sensor first (or the light will just come back on) then plug in the reader and press the "clear code" button. You'll be good to go. If you don't have a reader and someone else found the fault code for you, just roll by any auto supply store that offers free use of a reader (most major outlets). Plug it in and clear the code. Cheers
The plug for the computer is under the dash on the driver's side.