My local Honda dealer wanted $116 to remove the radio and check the serial number. (1998 Accord) I went home and removed 2 screws at the bottom of the plastic trim and pulled it out and held it up. Then I could remove the 4 screws holding the radio in place. I then pulled out the radio enough to turn it upside down and read the serial number. Call the Honda phone number on the Honda owner's website or go to the dealer for the radio code to enter using the radio pushbuttons.
you get a key
Answering "How can you diagnose a 1998 Honda accord without an OBD scanner?"
Impossible to answer without knowing the year Honda Accord which you failed to list.
Replace the starter
Call a locksmith.
If you are asking about the radio unlock code you enter it with the radio preset buttons.
550.00 @ Honda of Annapolis. Having the same problem with my 92 Accord.
No, Not without customization.
You input the code with the radio preset buttons.
No, it will not fit without major modifications.
NO!NO!
I had the same problem with my Acura. I called the dealership where I bought it, and they looked it up and gave it to me....