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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 12:15
 
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there's no spare wires in the stock 5ME loom for an O2 sensor. you'll need a 5MGE or better loom to do this (or drag in extra).
You could (at a pinch) sacrifice the supply wire for the Vacuum valve that enables/disables the air pump. but that won't help you for a heated O2 sensor.
fwiw: when i convert my 5ME to megasquirt (this holiday) i'm going to use the AFM wires (two are live, the third is an earth) . I have a 3 wire O2 sensor (thanks wilbo!) so i don't need to run a separate earth for the sensor.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 12:34
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Why do want one?
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On Probation
Location:
Hobart
Registered:
December 2004
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 12:49
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i got no idea :S
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 21:55
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I just got myself a 5M-E ECU from America with an O2 input... I want to keep the car with the 5M-E so I don't get hassled by the Authority (as well as my parents). The dilema is that there is no such wire for the 02 sensor and I don't know if the sensor required is 1,2 or 3 wire...
Thanks all...
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 22:06
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the ECU (generically) needs only 1 wire, the signal wire. the extr wires in 2, 3 and 4 wire sensors are for signal ground (so it has a better reference than the exhaust), and for a heater. basically you can use any sensor, as long as you wire it correctly. wire the heater off an ignition source (maybe fuel pump power), wire the signal ground to the ECU's ground, and then the signal wire goes to the ECU.
i'm using normal wires for my heater circuit (it can pull up to 5 amps when cold), and using 2 core double screened microphone cable for the signal (a bit overkill, but.. meh)
all you need to do is identify which wire on the ECU is the O2 signal pin. then just run new wires 
Cya, Stewart
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Tue, 21 December 2004 22:36
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Oh, that easy  , hardest part is trying to find the right pin out... as I know there are 4 blanks... as for the wire, i am trying to figure how to add an extra pin into the factory loom...
Cheers.
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Location:
Brisbane
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 00:44
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I thought all that was required was to run the wire for the O2 to the ECU (I suspect the ECU will use a 1 wire O2 sensor)...if its a heated sensor (3 wire) run 12v's to it with an ignition relay trigger?
Or are you trying to find where the O2 wire should go into the ECU? Should be marked on the PCB of the ECU if you get stuck there? But I thought that even the AUS 5me ecu had O2 marked on the pcb (just doesn't go anywhere?)...
Cheers
Wilbo
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 00:53
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I am getting itchy in not using the car so I took today off *cough cough* to fix the O2 to the car... only problem is finding the Pin out and also finding an O2 compatible to the ECU... Is all O2 the same?
I'll include of a scan of a MX62 ECU Diagram, all I need to know is which part of the yellow ecu plugs to add the extra wire...
Here is the diagram of the ECU of the MX62 (Aus Spec). All I need to know from the plug diagram below is where the O2 pin is.
http://img.photobucket.com/albums/v466/CelicaSupra /bd19c8bc.jpg
Cheers.
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 01:31
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| ZZT231 wrote on Wed, 22 December 2004 10:53 |
I am getting itchy in not using the car so I took today off *cough cough* to fix the O2 to the car... only problem is finding the Pin out and also finding an O2 compatible to the ECU... Is all O2 the same?
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O2 sensors are mostly the same - more modern cars might have wideband sensors -but unless you're paying >$150/200 dollars for it then assume narrowband.
for instance, a ford-sourced O2 sensor will do just fine for my 18R and/or 5ME
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I'll include of a scan of a MX62 ECU Diagram, all I need to know is which part of the yellow ecu plugs to add the extra wire...
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you''ll have to open up the ECU and look at the under side of the board to see which pics are not going anywhere.
that diagram won't indicate location in the plug.
if you're swapping ECU's you'll have to make sure that the other input/outputs are in the same place.
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Here is the diagram of the ECU of the MX62 (Aus Spec). All I need to know from the plug diagram below is where the O2 pin is.
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As noted previously, there's no O2 sensor in a Aus-delivered 5ME loom. There's no O2 sensor in that diagram at all
You could use one of the un-used pins in existing 5ME plug but you'll have to make sure that the ECU side of pin is not being used for something else
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just got myself a 5M-E ECU from America with an O2 input
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Are you sure it's not a 5mge ECU? 5ME is a primitive device - hence the engine relying on mechanical means (EGR, air injection) to control emmisions.
Can you put up a pic of this other ECU with the lid off? it should have pin in/out info printed on the upper (component) side of the PCB
| wilbo said |
Or are you trying to find where the O2 wire should go into the ECU? Should be marked on the PCB of the ECU if you get stuck there? But I thought that even the AUS 5me ecu had O2 marked on the pcb (just doesn't go anywhere?)...
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on the board there is an E01 and E02 - but these are earths (5 of the pins are earths!).
My notes for the 5ME indicate (n/u = not used):
top row:
E2 - VS - Vc - n/u - IDL - Psw - TL - n/u - n/u - THW
bottom row:
IGN - E1 - VB - +B - STA - E - n/u - THA - #10 - #20 - E01 - E02
hope this is of some help.
cheers,
charles-on-holiday!
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 01:32
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When you open up the ECU, you will see the pins labelled. The one that should be the oxygen sensor pin is blind ending.
The Aus spec MX62 and MA61 5ME ECUs will not make any sense of an input from an oxygen sensor as it is not being processed.
This was discussed a while ago.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 02:12
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Now look on the other side. You'll see it goes nowhere.
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 02:22
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on the stock 5ME board, that pin goes nowhere
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 02:36
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Sorry GT, there are two photos I am going to post up. One photo is that of the Australian 5M-E ECU (greenish-blue board - part number visible 079721-0911) where you can see it's (a dead end for the O2 sensor and) different to the American 5M-E ECU (green board) where the connection is not dead end.
Australian ECU
American ECU
Cheers.
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 02:42
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do all the other inputs go to the same locations?
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 02:46
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| thechuckster wrote on Wed, 22 December 2004 12:31 |
| Quote: |
just got myself a 5M-E ECU from America with an O2 input
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Are you sure it's not a 5mge ECU? 5ME is a primitive device - hence the engine relying on mechanical means (EGR, air injection) to control emmisions.
Can you put up a pic of this other ECU with the lid off? it should have pin in/out info printed on the upper (component) side of the PCB
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To sink this issue with all of you who doubt me... I got an ECU from America after speaking to someone on this forum... It's not a 5M-GE as I specifically asked for a US MX62 5M-E ECU.
Here is the photo of the ECUs the thiner one is Australian, the thicker one is US.
And yes... All in the same location.
Thanks
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Location:
Brisbane
Registered:
February 2003
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 03:01
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| thechuckster wrote on Wed, 22 December 2004 13:52 |
feel doubted no more ...!
did their 5ME have all the polution gear we got?
i take it that your aim is to remove the air pump and EGR hardware? and run proper close loop emmision control as oposed to the horse-and-cart technology of air pump+EGR?
woot!
update: you should have imported a box load of them and sold them to all the other folks with chocked 5MEs
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I decided to test the theory as a thread was created by me a year or so ago with very informative input from GiantTomato and Allan. That is why I held off for a year...
Now since petrol is gone through the roof and my 5M is thursty then ever. I decided to fix the car before I get unemployed next month. My Quest was to do this and be the first to do it... I was going to do it quietly but since there are a lot of us out there. Why not... What the hell...
As for getting an ECU, I waited 3 months before one was located. They are comming rare apparently but I'm happy... I got one  now I have to find an O2 sensor compatible with it... I'll just go to Repco and get a Universal O2 sensor just to see how it will perform...
Cheers.
Cheers.
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 03:09
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| ZZT231 wrote on Wed, 22 December 2004 13:01 |
<snip>... now I have to find an O2 sensor compatible with it... I'll just go to Repco and get a Universal O2 sensor just to see how it will perform...
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it might be worth your while to scavange one from the wreckers?
but damn good idea - i figured the engine wold have been universal in build - and that to get o2, you'd have to go to the GE models...
did your original thread go discuss if the 5MGE ECU was suitable for running 5ME engines? obviously the map would be off target (being designed for a twin cam) but was it a contender?
cheers, charles.
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Location:
Brisbane
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 03:14
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Yep, told ya it would be marked on the pcb
(also if you look in the tech docs section on this site, you will find the 5m-e efi wiring, which is simply a picture that I took out of my haynes manual (and gave to nark to host up...) DOES have wiring for the O2 sensor if my memory serves me right...showing that USA MX62's obviously have/had O2's. 
Charles, remember me playing with the MTEU ecu? My aim was much the same, to run the O2 sensor to improve closed loop economy (ie highway)
Cheers
Wilbo
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Location:
Brisbane
Registered:
February 2003
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 03:20
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yah - by bahd...
i thought that was for 5mge - as it seemed ot follow the electricals in the mark2 TSRM (which is for a US-sourced 5mge engine) ...
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 22 December 2004 03:35
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I just phoned the forum member that told me about the US ECU. He said to go to Dick Smiths and get some coaxual cable coz of the shielding properties... The O2 sensor is here... I'll let you guys know in a few hours how I go... The Haynes/Toyota Factory Service (Aust. Spec) manual does describe the O2 sensor but doesn't talk much about it and also doesn't give me the detail pin location...
*Sure beats writing CVs and filling out selection criteras...
Cheers.
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Location:
melb
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 12 January 2005 15:36
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hey just wondering if you finnished installing the new ecu?
has your fuel economy improved much?
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: MA61 Oxygen Sensor Wire exist?
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Wed, 12 January 2005 21:06
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I'll post my finding when I get to drive the car more often, but currently the MA61 is off the road a few days after the ECU swap for other reasons...
Cheers.
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I just want to know if there is a wire existant. All I want to know where it is in the loom so I can add it*edit
