More than one year ago, I install in My Evo 4 JDM an Evo 8 ecu (USDM) and run it with 96530006 ROM (AUS/SA market).

When I install that ecu and ROM wit the inmo disable, the rear o2 light was on. how can I disable that light???

I saw some threads here but I´m not good with ecuflash and edit definitions!! Some one can help me please?

 

is FAA bit 1 set to 1???

i managed to get 9653 working very good in my evo 4

EDIT: now saw it's 9353 not 9653. still check it though

 

Thanx!! yeah is 9653 hehehe.

Ecu Periphery (FAA) bit 1 is set to 0.

 

well set it to 1 and try it

there is a rear O2 heater patch, i think it comes with 9653

 

Ok thanx man!!! I will try it today!!!

thanx for your time!

 

I´d try like you say but rear 02 sensor light always is ON. When I scan the ecu looking codes the 02 sensor bank 1 is gone, but light is ON... what can I do?

 

faa bits set bit 14 to 0 if you still use the stock evo4 o2 sensor its a non heater 2 wire type where the 8 one was 4 wire heater so the cel is prob for the open heater circuit when you say rear o2 sensor light always on do you mean the red light with what looks like a cat ???? if so that the hot cat light only on evo 3 and 4 where they ahd a temp sensor in the rear of the cat just join the two wires together where they come out through the floor ,, its only a warning light and has no other function

 

yeahhh!! is the red light looks like a cat!!

that two wires I don´t know where are they ... And bit 14 always set to 0????

 

below drivers seat theres two wires that go out through the floor alternatively remove the bulb from the dash .
is you fr o2 sensor working ???

 

i don´t think so!!! i belive that not working.

 

lol log fr o2 sensor voltage evoscan eng warm idling

 

to get rid of the cat light, take pin 40 from the ecu output and connect it to pin 92 (sensor ground)

question, does your speed reading work? without this, gear based boost cannot function right?