Question about 2000 Hyundai Elantra

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DLC communications with OBD not possible

Have taken my 2000 Hyundai Elantra in for state emissions testing and the results were: On-Board Computer: Unable to test the vehicle because OBD communications could not be established. Vehicle testing site suggested checking the cigarette lighter fuse to see if it was either faulty or blown. Checked the fuse and it appears to be okay.

Any suggestions?

Jim T.

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  • Anonymous Feb 20, 2009

    I have the same problem, but I have a 96 Accent. I've checked and double checked all my fuses and they are all good.

  • cariyawa Apr 03, 2009

    Car: Hyundai elantra 200(GLX)
    I have the same problems and I discovered it in a hard way by spending almost 200$(. So one of my friend tried to clean the connector while I was not present. He removed few wires simultaneously and now I couldn't figure out which wire goes where. So can anybody help me to find the pin assignment of the connector?

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OBD II connector troubleshooting 101

I had the same problem with my 2000 Elantra. the OBD II connector pins get squished and won't make cantact with the scan tool, therefore no connection. the solution is to bend the pins back so they will connect to the scan tool.


FIRST! check your lighter and radio fuses (which you have already done). If possible, make sure your scan tool is working properly, try it on another car. If it is functioning properly, remove the 2 screws holding the obd II connector to the dash. Look for obvious signs of corrosion, damage, or stuff that shouln't be in the connector (rocks, gum, etc.) clean the connector with a good electronics cleaner (I use the CRC stuff), you can usually find it at you local parts store, radio shack, or even wal mart. hose down the inside of the connector thouroughly and allow time to dry.

check for voltage between 4 (gnd) & 16 (+vcc) then 5(gnd) and 16(+vcc) with the ignition on the voltage should be between 12v-16v (these pins may be different on other cars, look for an OBD II connector pinout diagram if your car is different). If this voltage is not present at either pin, the problem is not the connector. check your fuses and wiring. if this voltage is present at both pins continue.

Here's what I did. with the connector free from the dash, you can see the back of the connector where the wires enter the connector. on either side of the connector there may be a white clip. pop both of them off. you should be able to push a small screwdriver or pick in that space to pull the pins back out towards the outside of the connector. do one at a time so you can tell if the pin has moved back out into position. do this for all of the pins. Try to connect. if still no luck try again to push out the pins and reconnect.

If your connection is restored, replace the clips, screw it back into the dash. Return your car to the lousy DMV where they will proceed to tell you something else is wrong which they neglected to tell you on your first 10 visits!! :-)

Stuff thats good to know:
some auto parts stores will connect their OBD II scan tool to you car for free. auto zone is one place
some times the computer will need to reset to restore a connection to the scan tool. to do this simply cycle the ignition off (wait a few seconds) then on again.
online auction places are a excellent resource for USB to OBD II connectors to connect your laptop to your car. there is lots of OBD II diagnostic freeware out there to go with your newly purchased connector.

Good Luck

Chris
-CL Systems

Posted on Feb 06, 2009

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