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rear o2 wire color (evo ix)

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Old Mar 22, 2011, 03:17 PM
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rear o2 wire color (evo ix)

i just want to verify that it is a blue/purple stripe wire?

im trying to wire my lc1 into the ecu, i bought ecu pins but am having no luck depinning the wire, so before i cut and solder id like to be VERY sure which wire it is.

i have the ecu pinout which states pin #72, but it doesnt list color. Jack_of_trades tutorial on depinning shows him working on what appears to be that pin number and a blue/purple wire.


any help would be awesome!
Old Mar 22, 2011, 06:33 PM
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I posted this in the LC1 thread..

Just did my AEM UEGO wideband last night. Tapped into the rear o2 sensor connector rather than at the ECU. The correct color wire on the rear o2 sensor harness is white with silver on my EVO 9.
Old Mar 22, 2011, 07:37 PM
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yeah, im loking for the color at the ecu though, i just found out the hard way i got it wrong, as im now logging afr in evoscan under coolant temp dammit.

now im super confused because the rear o2 and coolant temp sensor wires arent even on the same plug. i have no idea how the eff i wound up on the wrong plug completely.

also it makes no sense because the readings look like afr's, but the formula shouldnt be right...now im afraid i really fahked stuff up
Old Mar 22, 2011, 07:59 PM
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nevermind, im a tard, im not logging it under coolant temp, i realized i changed the order of the logging list in evoscan while running a log. it all appears to be working.

BUT, now i have a CEL P0031 heater control circuit low (bank 1 sensor 1), which now scares me, since i didnt mess with anything front sensor related. i knew i shoulda never messed with his stuff...

Last edited by killerpenguin21; Mar 22, 2011 at 08:13 PM.
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