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OBDII Port not working, Am I missing things?

EJ25D Legacy Outback OBDII Diagnostic wiring

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5 replies to this topic

#1 suprunner

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Posted 23 October 2016 - 05:23 PM

Hey guys,

 

 I have a '98 Legacy Wagon that I'm trying to read some CEL codes from. The problem that I am finding is that the black connectors are not anywhere to be seen under the dash. Also, when I connect an OBDII reader, nothing happens. No power. I've checked all fuses. I've been searching the internet, and it appears that my OBD port isn't the same as everyone elses... I've attached pictures of what my OBD port looks like. Pin 16 is supposed to be the power lead, but I don't have a wire there. Any suggestions?

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#2 Fairtax4me

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Posted 23 October 2016 - 09:39 PM

No that's correct. You should have 12v at all times on the red wire in pin 1. That wire gets power from the same circuit that feeds the fuel pump relay, main relay, and the ECU.
Check for 12v there. Key does not need to be on, it should be hot all the time.
If that has 12v, Check your ground on the black and red wires. That circuit grounds to the engine with the main ECU harness on top of the intake manifold.

Edited by Fairtax4me, 23 October 2016 - 09:39 PM.


#3 ocei77

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Posted 24 October 2016 - 03:10 PM

There is a fuse that controls it also. Check that. it's listed on the cover.
In addition an engine bay sbf controls it and the fuel pump.

O.

Edited by ocei77, 24 October 2016 - 03:12 PM.


#4 suprunner

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Posted 25 October 2016 - 08:40 PM

There is a fuse that controls it also. Check that. it's listed on the cover.
In addition an engine bay sbf controls it and the fuel pump.

O.

My fuse box doesn't reference it, and none of the fuses in the kick-panel or engine bay are blown. 



#5 suprunner

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Posted 25 October 2016 - 08:41 PM

If an OBDII reader isn't connecting, is there a way to jump the OBDII female end?



#6 Fairtax4me

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Posted 25 October 2016 - 08:53 PM

Did you check pin 1 with a voltmeter to see if 12v is getting to the plug on the red wire?

If the engine runs, the fuse is fine. Same fuse gives power to the ECU, fuel pump and main relay. If you have no voltage at pin 1, there's a break in the wire somewhere between the connector and the relays where it splices into the supply circuit.





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