Joec500

Well I am still trying to figuire out why my OBD II cannot get the codes pulled. I was wondering about two things. First, is the OBDII diagnostics built onto the the MAIN Ecu?

The possible problems that I see are that the OBDII portion is shot so I want to try to replace that piece and try to pull the codes again. Or the wiring is bad, or got crimped somewhere.

So I was hoping I could get a new wiring loom from the OBDII connector to the OBDII computer itself and try that.


AND also try just changing the OBDII computer.


Any Thoughts guys? and know a place where I can get these parts for not too much $$



Thanks Guys!


Joe

heliax

I dont know for sure, but I think OBDII is 97 and up only- that could be the problem, gl

Joec500

Actually it's 1996 and up.All 3rd gens have an OBDII Diagnostic

TDiddy

Yes, 96 and up. I think they have recently switched to OBD III as well on the newest vehicles.

heliax

doh- yeah I just looked it up at batauto.com. sry man

FattyCBR

OBD (I or II) refers to the way that the ecu recognizes errors or problems with the engine. It's actually part of the code in the ecu and can't be "changed" by itself, you would need to replace the entire ecu.

I still think your story sounds funny about the dealer not being able to read any codes. I would call up the service mgr. and at least chew his ear off for charging you for a service they didn't perform.

Joec500

Oh yah....Toyota of Seattle decided not to charge me the 96 dollar diagnostic fee after some talking to.

But I did take my vehicle to an independent Toyota Repair shop, who could not pull the codes either. I have actually used 3 other OBB II scanners myself and still could not pull the codes.


Anywways they are replacing my ECU and my extended warranty is covering the costs minus the $100 deductible. I even get a rental car.



Hopefully the ECU is the problem and not the wiring from the OBDII port to the ECU. Is it possible to replace the OBD II wiring loom from the ECU to the scanning port? in order to test if that is the problem? Or is it more invloved than that?



Thanks Guys,


Joe

FattyCBR

Well if the new ecu doesn't fix the problem then you will know the wiring is bad and that should be covered under warranty as well. Can you ask them if you can have the old ecu? I'll buy it from you if you're interested.