It sure can. I did it on mine. Check internet for what you need, which is a keyless entry kit with a control module ant two remote controls (I don't remember where I got mine, as it was over three years ago). The kit includes instructions. Only problem I had is you have to remove the plastic interior box under the radio, as that's where the module goes. It is held in with a single screw that must be removed, but even then, it's tough to remove. After trying for awhile, I couldn't do it, and took it to a Honda dealership. Fortunately, they didn't charge me anything to remove it, and the mechanic there did it easily in a couple of seconds - He just jammed both hands into it and pulled. I guess I didn't have the right touch. Hooking up the module is simple, and instructions for programming the remotes is also simple.
No it is standard on ex and dx
It was an option that was available. Some have it and some don't.
Yes, just got to the Honda website (www.honda.com, then go to OwnerLink) and you can search for accessories specific to your vehicle. The keyless entry system for the 2003 Honda Civic LX coupe costs about $250 without installation; it's $350 installed. The accessories are available for purchase through the Honda online store as well.
You will know that your Honda Passport has a keyless entry by the absence of a keyhole. There will also be numbers on the door for a lock combination.
http://www.autotalk.com/how-to/honda-element/honda-element-03-04-keyless-remote-programming-instructions.html
The keyless entry module on a1998 Honda Accord is located underneath the dashboard. It is housed on the driver-side the of dash close to the main relay.
Keyless entry is an option and may have not been installed.
If the keyless entry works on your other dooor(s) then electric lock motor may have failed. If it doesn't work on ANY doors, then the battery in the keyless remote has probably gone dead. If it is the electric motor, it is your decision if youwant to spend the money to repair it, or just get used to using the key to manually lock/unlock it.
I have a 1998 2 door Honda civic and mine doesn't have keyless entry or an anti theft system installed, you can buy an anti theft system and install it, but they can be expensive
Needs remote starter installed
Try this site: http://www.ehow.com/how_4470692_program-honda-keyless-entry-remote.html
While It is possible for an amateur to install a keyless entry remote it is not advised as the installation requires a high level of skill using new electronics tools.