Obd II port

1999 MITSUBISHI ECLIPSE
185,000 MILES • 2.0L • 4 CYL • 2WD • MANUAL
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MAGSENTONE
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Hello, my name is Michael and I am having an issue when a DTC scanner is plugged into my obd 2 connector. When scanner is plugged in it sometimes powers up and then turns off and then has trouble communicating with the scanner. I was wondering could it be that one of the pins is bent or even clogged with dust or debris causing an unclear reading? Also, where I got the car smogged, the the guy was able to get it go communicate and passed smog but advised me to get that issue fixed. He said he was able to check the monitors without using the obd2 port, how is that done and get the car to communicate without using port? Any ideas to this situation? I highly appreciate your thoughts and ideas. Thanks so much and God bless.
Michael.
Mar 4, 2018 at 8:40 PM
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ASEMASTER6371
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Good morning.

Yes, check the pins on the port for being spread or damaged. From plugging and unplugging, it is common for the pins to spread out.

No, you cannot communicate with the monitors without access to the OBD 2 port.

Roy
Mar 5, 2018 at 4:46 AM
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MAGSENTONE
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Okay, will do with my multi-meter. thanks a lot.
Mar 5, 2018 at 10:43 AM
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ASEMASTER6371
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Diagram attached. pin 16 is power and pin 4 is ground. make sure they are correct.

Roy
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Mar 5, 2018 at 10:49 AM
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MAGSENTONE
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Is this for a 1999 Mitsubishi Eclipse GS? thanks so much! I appreciate it.
Mar 5, 2018 at 11:45 AM
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ASEMASTER6371
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No problem. We are here to help.

Roy
Mar 5, 2018 at 11:49 AM
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MAGSENTONE
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Hey Roy, I tested all my fuses and all is good un-switched and switched fuses in both fuse boxes. however, when I went to test the pins on the back of obd2 port my test leads would not fit inside connector. Any suggestions? I have seen someone nice use test lead probes that appeared to be like needles that just slipped right in the back of connector.

Thanks again Roy,
Michael
Mar 5, 2018 at 5:11 PM
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ASEMASTER6371
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You can use a paper clip in the connector to test for powers.

Roy
Mar 5, 2018 at 5:52 PM
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MAGSENTONE
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Thank you very much Roy!
Mar 5, 2018 at 6:47 PM
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You are welcome.
Mar 5, 2018 at 6:50 PM
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MAGSENTONE
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Hey Roy, it is Michael. So I tested pin 16 and it reads 12 volts, on pin 4 for the ground I disconnected negative battery and set meter to ohms but could not get an accurate reading. Kept bouncing around and then went to 0. What setting of ohms do I set it to, 20,000 or 200,000? There are like five settings on ohms. Thanks again.
Mar 6, 2018 at 5:07 PM
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ASEMASTER6371
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Okay, to check the ground do this, reconnect the battery and use your voltmeter. Put the black lead in pin 4 and the red lead in pin 16. If you read twelve volts, the ground is good.

Roy
Mar 7, 2018 at 2:26 AM
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MAGSENTONE
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Thank you Roy will do.
Mar 7, 2018 at 9:19 AM
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ASEMASTER6371
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you are welcome.

Roy
Mar 7, 2018 at 10:48 AM
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MAGSENTONE
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Hello Roy, Ob2 port is working as I checked the ground and positive both with the voltmeter and still get 12 volts so that is good, thanks for that. It appears the OBD II port and the power locks are tied into the same fuse because it will not register with the power lock fuse out. I have another question regarding installing a shut off switch to the ignition switch. Do I tie the switch into all four ignition wires which are 12 volts constant, starter, ignition, and accessory? Or? Please let me know plus I think the switch rating has to match the 30 amp ignition switch fuse in the fuse box, right? Please let me know and as always thanks again Roy.
Mar 25, 2018 at 2:30 PM
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ASEMASTER6371
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Okay.

Are you trying to prevent it from being stolen?

Roy
Mar 25, 2018 at 3:10 PM
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MAGSENTONE
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Yes sir, because the factory security system only works about less than half the time now. Usually when you lock the doors a green security light comes on indicating security system is activated but it does not always work so I figure I would just do a shut off switch security system. What do you suggest?
Mar 25, 2018 at 3:40 PM
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ASEMASTER6371
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Okay, just keep it simple. I would go the fuel pump and find the wire for power to the pump. That is where I would install my shut off switch. Without a fuel pump, the engine will not run.

Roy
Mar 25, 2018 at 3:47 PM
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MAGSENTONE
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Would that be better than just a in-line fuel shut-off valve? Also, if I use a switch type for the fuel line wire would I need an in-line fuse and if so which amp rating? Because I noticed before that I do not have a fuse for the fuel pump in any of the fuse boxes unless it is labeled different. By chance do you know what is ELC-14 it is a a 10 amp fuse slot in my fuse compartment by the drivers side kick panel? Thank you Roy.
Mar 25, 2018 at 4:24 PM
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ASEMASTER6371
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no to the valve.

I would go to the fuel pump and cut the wire then wire in the switch to allow current to the pump and to block it when the switch is off. Simple installation. No fuse needed as the circuit is already protected.

Roy
Mar 25, 2018 at 4:33 PM
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MAGSENTONE
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Thank you so much Roy. I guess that is better than the ignition switch eh?
Mar 25, 2018 at 4:40 PM
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ASEMASTER6371
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yes sir, much better and easier.

Roy
Mar 25, 2018 at 4:44 PM
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MAGSENTONE
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I just looked up the diagram of where my fuel pump and lines are and it appears I would have to drop the fuel tank just to get to the wiring harness.Anyway of just tying up the switch to the ignition wiring instead?
Mar 25, 2018 at 5:34 PM
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ASEMASTER6371
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Okay, no, the pump is accessible from the top. Remove the rear seat bottom and there is an access plate to get to the wiring.

Picture attached.

Roy
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Mar 25, 2018 at 5:41 PM
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MAGSENTONE
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I had a hunch it was, just was not sure and thought I would possibly have to access it from the bottom. You are the best Roy. Accept donations?
Mar 25, 2018 at 5:52 PM
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thank you.

Yes we do. you can contact the site customer service. it is very much appreciated.

Roy
Mar 25, 2018 at 5:58 PM
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MAGSENTONE
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Okay cool, Thank you Roy!
Mar 25, 2018 at 6:35 PM
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MAGSENTONE
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Hello again Roy. So I removed the access plate which is the one under the removable rear seat behind the passenger and found the plug giving the fuel pump power there is a harness going through a rubber boot and then then wires connecting to the plug or socket which the blue and black is power and there is a black ground. should I just wire it into the positive near the plug? not a whole lot of room to splice there with a crimps and I cannot see those power and ground wires further back in the harness that split off to the power plug that connects into the socket. Please let me know when you get a chance. Thanks so much.
Mar 26, 2018 at 1:47 PM
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ASEMASTER6371
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Okay, yes, you can tap into the power or the ground. which ever is easiest for you.

Roy
Mar 26, 2018 at 3:18 PM
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MAGSENTONE
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Okay, so just ground one end of the switch to the chassis somewhere near switch location and just tap the other wire to either the power or ground wire on the plug going to fuel pump?
Mar 26, 2018 at 4:52 PM
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MAGSENTONE
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Just to be clear, wire the top end of switch to positive wire on fuel pump connector and just chassis ground the bottom part of switch to a good ground somewhere I mount the switch?
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Mar 26, 2018 at 5:13 PM
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ASEMASTER6371
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No.

You will cut the wire, mount one part of the wire to the top terminal and the other part to the bottom. you are putting the switch in line with the pump wire.

if you connect it the way you just stated, you will short circuit the connection.

Roy
Mar 27, 2018 at 3:33 AM
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MAGSENTONE
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Right, duh. haha. I realized it later after I sent the email. I have done residential wiring but not much car audio or wiring besides a simple stereo and speakers but electricity I guess works the same. Thank you for your support Roy!
Mar 27, 2018 at 9:47 AM
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ASEMASTER6371
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no problem.

Roy
Mar 27, 2018 at 9:49 AM
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MAGSENTONE
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One other thing Roy, I could not find the amperage on my fuel pump and since I cannot find the fuse I guess my car uses a relay which I believe is above the fuse box compartment under the hood. So my question is my switch is, 20A 12v dc 240 watt plastic black on off switch using red 16 gauge automotive wire, is this okay?
Thank you Roy.
Mar 27, 2018 at 10:25 AM
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ASEMASTER6371
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sure, it is good. you can use 18 gauge as that should be the gauge running to the pump.

Roy
Mar 27, 2018 at 12:01 PM
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MAGSENTONE
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I would have to go buy 18 since I only have 16 gauge on hand. will 16 work or cause a possible fire? sorry to bother you again Roy.
Mar 27, 2018 at 12:28 PM
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ASEMASTER6371
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no bother at all. 16 is good. it is heavier. if you were using thinner then yes, that would be no good.

the 16 is fine.

Roy
Mar 27, 2018 at 12:31 PM
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MAGSENTONE
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Okay cool Roy, thank you so much again! You have been so much help, truly. is this a non-profit company?
Mar 27, 2018 at 12:39 PM
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no, they gladly accept donations to keep it going.

you can contact the customer service if you would like to donate.

thank you.

Roy
Mar 27, 2018 at 12:44 PM
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MAGSENTONE
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Okay just as long as it is a secure site only because we are dealing with electronic funds and such. Perhaps I can mail them a money order.
Mar 27, 2018 at 1:24 PM