gearheadib

what supplies power to the OBD2 port? My hp tunes will not communicate with the pcm any more.

Pounder

don't remember but mine was the cig. lighter fuse or the console aux fuse ???

Bill Curlee

There IS a fuse for the OBD2 power pin.

Something else that can screw you is having damaged / spread apart female pins inside the ODB2 connector.

YES, they can get spread apart and cause all sorts of tuning and scanning issues. I would actually read that power pin to ground with a meter and see if it has power.

gearheadib

what pin on the OBD2 connector needs power? what is the name of the fuse? and where is it?

Greg_E

Data Link Connector

Gordy M

Simple test it to see if the Cigarette light works, if not it is the fuse.

The fuse is #07. It reads C/LTR (20 amp) It is in the Instrument panel Electrical Center.

If the lighter works then look at the OBD2 terminals for bent pin.

Greg_E

Where are you finding that information?

Pounder

funny I mentioned that in post 2 ????

Greg_E

Except that isn't what I'm finding when I look in the manual.

gearheadib

the fuse is good but i have no power at the cig lighter or OBD2 port

obnoxus

Checked with a meter, or visual?

Did you try another fuse?

gearheadib

yes a meter and yes a new fuse

turbotuner20v

What was the resolution to this? Having a similar issue

oharal

This is an old thread so you may not get a reply from the original group. But if your fuse 29 (I/P fuse panel under the pass side floor board) is good and you don't have power at the Data Link Connector Pin 16 I would check the connectors in the back of the I/P fuse panel. The DLC gets 12V from a grey connector, but there are 3 of them I'm not sure which one it is but it's called "C2" in the service manual. Check that they're all pushed in all the way and the terminals aren't messed up inside the connectors. It's an orange wire so that might help you narrow it down if you want to try checking continuity between the connectors to see if there's a break.

EDIT: my books are for my 2002. Not sure what your year is but this may be applicable anyway.

turbotuner20v

Thanks, I had checked all the fuses that were installed to ensure none were blown, but fuse 29 was missing entirely and I missed that. Installing a fuse fixed the issue. Just bought the car so unsure why it was missing.

oharal

Well by golly I sure do love a (nearly) free and easy fix

BABYBUGY

My OBD port was not working also and my footwell lights and trunk lights didn't work
after much banging of head and reading witch to me is the same lol
it turned out to be fuse #29 in the footwell fuse box for all those issues

hope this helps