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OBD II port

Tiny
MAGSENTONE
  • MEMBER
  • 1999 MITSUBISHI ECLIPSE
  • 2.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 185,000 MILES
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.
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Sunday, March 4th, 2018 AT 8:40 PM

153 Replies

Tiny
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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
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Monday, March 5th, 2018 AT 4:46 AM
Tiny
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Okay, will do with my multi-meter. Thanks a lot.
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Monday, March 5th, 2018 AT 10:43 AM
Tiny
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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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Monday, March 5th, 2018 AT 10:49 AM
Tiny
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  • 85 POSTS
Is this for a 1999 Mitsubishi Eclipse GS? Thanks so much! I appreciate it.
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Monday, March 5th, 2018 AT 11:45 AM
Tiny
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No problem. We are here to help.

Roy
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Monday, March 5th, 2018 AT 11:49 AM
Tiny
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  • MEMBER
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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
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Monday, March 5th, 2018 AT 5:11 PM
Tiny
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You can use a paper clip in the connector to test for powers.

Roy
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Monday, March 5th, 2018 AT 5:52 PM
Tiny
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Thank you very much Roy!
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Monday, March 5th, 2018 AT 6:47 PM
Tiny
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You are welcome.
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Monday, March 5th, 2018 AT 6:50 PM
Tiny
MAGSENTONE
  • MEMBER
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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.
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Tuesday, March 6th, 2018 AT 5:07 PM
Tiny
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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
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Wednesday, March 7th, 2018 AT 2:26 AM
Tiny
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Thank you Roy will do.
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Wednesday, March 7th, 2018 AT 9:19 AM
Tiny
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You are welcome.

Roy
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Wednesday, March 7th, 2018 AT 10:48 AM
Tiny
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.
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Sunday, March 25th, 2018 AT 2:30 PM
Tiny
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Okay.

Are you trying to prevent it from being stolen?

Roy
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Sunday, March 25th, 2018 AT 3:10 PM
Tiny
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?
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Sunday, March 25th, 2018 AT 3:40 PM
Tiny
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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
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Sunday, March 25th, 2018 AT 3:47 PM
Tiny
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.
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Sunday, March 25th, 2018 AT 4:24 PM
Tiny
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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
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Sunday, March 25th, 2018 AT 4:33 PM
Tiny
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Thank you so much Roy. I guess that is better than the ignition switch eh?
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Sunday, March 25th, 2018 AT 4:40 PM

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