My FIC will be arriving tomorrow and plan on installing tomorrow evening. I have several pieces of data including the 07 ecu pinout, fic install manual, and the 05-06 wiring diagram, through using all three ive been able to figure out about 90% of the wiring but there are still thing im mystified on, things such as, where to ground the unit ground and sig grounds and which 02 sensor wire to attach to. Basically im looking to see if anyone has an actual 07-08 fic wiring diagram similar to the one listed for the 05-06 which would make things a lot easier O and if you don’t have anything to contribute to this, please don’t post. (Things such as buy a harness and other stupidities), thanks in advance for the help guys!

 

edit: ooops just reread that u already had this.

nvm sorry

 

buy a harness you asssssss holes are lucky they dont make a harness for the xb2 why hack up your harness when you have one on tap i dont get it

 

Haha at above - just had to say it didnt you! LOL anyways sorry but i already had that diagram Thanks though! I think ive deduced everything except where i could run the signal ground - it seems that maybe its just another ground for the fic ive looked at the 05-06 wiring diagram, 05-06 ecu pinout, and 07-08 ecu pinout and through comparing all of them the other wires were easy to figure out considering they didnt really change much. Just the pin they note to use for the signal ground on the 05-06 isnt even mentioned on the ecu pinout so thats where im stumped.

 

^^lol

 

add resistor ... 2.2k between magi + and magi -

gets rid of the crankshaft sensor code

 

Yea ive read that just didnt know if that was 08 only or 08-07. Also i think ive figured out the grounding issue, looks like i can route the pwr grounds to E8-3 and E8-28, the two main grounds for the ecu, than route sig grnd to E7-30 which is the isolated ground for the maf. Also looks like i figured out the 02 sensor so im good to go there, thanks for the tidbit on the resistor on the crank and cam pos.

 

The resisor cant hurt, i would suggest doing it anyway. I have found that this is common on alot of cars.

 

So i got the fic installed last night and things and things seem to be working well except i do have a few questions. A)Why does it seem when viewing afr on my wideband that at first when im driving for the first 3-4 min it seems like the maps on my fic arent taking affect (afr on guage stays around 13.8-14.0 under wot), but the whole time the fuel trims on my notebook look normal like its making the correct changes. Than after that tiem period it seems to work normal (holds 12.6-13.2 afr under wot), yet when looking at trims on the notebook it all looks the same? Doesnt make much since does it? Think maybe the heater on my wideband 02 sensor is dead so its taking this long for the exhaust to heat the sensor up? Also B) I seem to have a stumble around 2000rpm when under approx 70% throttle, im thinking this may be an 02 sensor problem, i know i ahve the correct 02 sensor wire, and yet it shows 0v on 02 bank1, either the connection may be loose where i connected it (which ill be checking here ina bit) or possibly my factory wideband 02 is dead Which would be bad although ive heard from the lexus guys are cars can technically run pretty well without it. Anyways any opinions are appreciated

 

Well i figured out the 02 sensor issue, if you set the 02 table to voltage - all cells must be filled in lol - total brain fart on my side, when using percent 0 will pas through factory sig, but when using raw voltage 0 will actually 0 out the 02 sensor signal

Still mystified on the afr issue