OBD2 swap without CEL?

[black_LS]

I'm looking at a '95 LS400 as a parts car, which is OBDII. I'm planning on running a manual transmission.

I'm wondering if this engine combo is more trouble than it's worth. I'm okay with a bit more wiring, but is it possible to get rid of all the 'check engine light' codes that are bound to pop up? I know the OBDII system has many more sensors and whatnot. The secondary O2 sensor shouldn't be a problem if I run cats.

I don't want to source an OBDI wiring harness or ECU separately. I'd like for it all to come from the same car.

So, is this possible or am I bound to get codes for missing components?

 

[gloverman]

Is it only the check light you need to worry about or does it matter that there are codes stored in the background which dont bring the check light on? I have only wired a few non-vvti OBD2 engines which where imported over here with Lexus badges. We normally get Non vvti engine as a OBD1 (up until 8/97). With the OBD2 early engine the only extra stuff I know about is the EGR valve and Californian spec air pumps. The ones I did still didnt have a check light on (yes it was wired) just like the VVti engines I wire.

 

[black_LS]

To answer your question, what's important to me is the check light staying off and the car running perfectly (ie. no limp mode).

I wanted to make sure it would behave since I was removing some of the Lexus body components (such as the fuel system, ABS, trac) and replacing with the donor vehicle's. I'm not sure what OBD2 looks for.

 

[gloverman]

They run fine when wired correctly (note I said wired Correctly). I was more wondering about the road worthy issues that are checked to keep the vehicle legally on the road. I dont know what regulations you need to satisfy over there. Some ECUs store a code in the background but it causes no running issues. With a bit of time the codes can be sorted with some resistors. I only have one from a Jap spec ECU which is a bit of a pain but Im doing three of theses ECUs at the moment so should sort it with a bit of research.

 

[andy10889]

I have a 96 US spec ls400 in my 1990 pickup truck and it throws codes for the transmission solenoids. Does anybody know a way around that? I hooked my light to the fuel pump so it turns off when the pump runs and on when the pump is off.