james250

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About james250

  • Rank
    Advanced Member

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  • First Name
    James

Profile Information

  • Lexus Model
    IS250
  • Year of Lexus
    2007
  • UK/Ireland Location
    Derbyshire

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  1. Just installed techstream. Going to play around with it later. What section is the error codes stored and pending in? Is there different sections for error codes?
  2. Agreed. All the points are good. Too many dodgy hid installations. If someone really wants hid they should get the correct headlight housing for it. Brake fluid testing I think is way over due and is a very good thing.
  3. Sorry might sound silly but i'm a bit lost. Do you mean disable reporting too much data to reduce data reading lag? So the more data it is reading the more lag there will be? is that what you mean? How do you select the data that you want only? and what is the ms reading you are referring to?
  4. @johnatg thanks. Those are great screenshots. Will see how mine looks when I connect it up. Will post an update once I have done so.
  5. An interesting video, seems to show Techstream being able to read AFR data. Surely if the Intelligent Sensor can read data via the ODB port then why couldnt TechStream. As long as the software is capable of it.
  6. I got pm'ed the link from another lexus forum but was told it's from the lexus service manual. I think it says start engine and run it at 2500rpm for 90 seconds to Warm up the Air-Fuel Ratio sensors. After that to do the 3 scenario monitoring. But i guess will there be any harm waiting longer to warm the engine as my engine hasn't been started this week so it will be really cold so would think might be worth while running engine for a bit before hand
  7. My techstream finally arrived. Somehow went missing in the post so had to be sent out another one. Going to install it this weekend and try it out. I just came across the following tech diagram that also refers to diagnosing the AF ratio sensors. But it for some reason has different instructions to the one @Shahpor posted. So it's a bit confusing. Based on the diagram below, am I correct in understanding that the procedure is asking to start the engine and run the rpm at 2500 for 90 seconds then go to the relevant section in techstream and carry out the 3 scenario tests that it lists. Based on the standard voltage table, the reference column says that scenarios 1 and 2 which is running idle and running at 2500rpm should both be between 3.1v and 3.5V. So that's a fluctuation of 0.2V each way. and scenario 3 should apparently see the voltage increase to 3.8V or more and then drop back. Is this understanding correct? Also, the second diagram i have attached is of a table that shows Lean and Rich voltage. It shows if voltage is 3.0V then it's rich and if 3.35 or more then it's lean. But that doesnt seem to match the first diagram. Or is the second diagram referring to if the ECM injects +25% fuel then in that condition the voltage of 3.0v or less will be Rich. And if ECM injects -12.5% and a voltage reading is 3.35 or more then it's a Lean situation? I guess we don't have a way to know how much fuel the ECM is injecting to do this comparison do we with techstream?
  8. It's definitely not downstream sensors. they are AFR sensors for sure but I now believe they are fakes. Because on the side of the box it had a photocopied colour toyota barcode. I am still waiting for my Techstream to be delivered to run live data on the sensors to see what kind of readings they are giving. If they are off I think I will go for the DOX-0263 as I believe those are the correct Denso equivalent in Europe.
  9. From all the research I have done, it seems that the European Denso sensors have different part numbers. I have no idea if the hardware itself is different. I checked with a few Denso suppliers and they all confirmed that DOX-0263 fits the Lexus IS250 upto 2008.
  10. Also further to my post above, I found the following youtube video which shows someone installing the DOX-0263 on IS250. It's not in English but the at 1minute in you can see the packaging that says DOX-0263
  11. @is200 Newbie and @normski2 I may be changing the sensors I got if it turns out they are bad. However, I am slightly confused regarding the part numbers. Upto 2008 Is250 has a OEM part number of 89467-30010. Now if you go to the densoautoparts website or rockauto website they give a denso equivalent part number 234-9051 which is what you purchased @is200 Newbie and for 2008 onwards they give denso part number 234-9048 and 234-9068. So if you actually go to most popular sites and auction sites you will actually find that no-one in Europe sells Denso part 234-9051. Even Denso Europe do not have this in their catalogue. It appears that to the European market, Denso Europe part numbers are completely different and here is my findings. Note: the reference website is Denso Europe website which is: http://www.denso-am.co.uk/e-catalogue/ these are the people who companies like Euro Car Parts etc deal with to stock Denso parts. According to Denso Europe website, the Denso Equivalent part number for 2005-2008 is DOX-0263. If you go into the specs of this as in screenshot below it matches the same spec as the one from the American Denso part number. The part number for 2008+ is DOX-0506 and according to the specs the main difference is the length of the cable. If you look up the tech specs for the DOX-0263 it appears to fit the IS250 upto 2008. I went to Euro Cart Parts website and they have the Denso sensor advertised at over £329.99 each which is ridiculous. But it states it fits the OE number. So I spoke to Euro Cart Parts to see what the Denso Part number they have for that product is and they confirm that the Denso Part number is DOX-0263. The DOX-0263 is much more reasonably priced than the OEM toyota ones and you can get them only varying between £90 and £100 each. Not sure if anyone else has any experience with this. But there is not much info out there. And it appears the DOX range is a european product code with a EAN number.
  12. Oooops yes silly me how did I miss that LOL
  13. Thanks @Shahpor I am still waiting for delivery of the TechStream, should arrive sometime next week. Once I get it I will post a screenshot. Should I run the live data at a certain RPM and once engine has warmed up or run it straight away even if engine is cold?
  14. @Shahpor that's great info thanks. I am waiting for delivery of the techstream when that comes i will look at the live data and see what's going on. Is there anything else I should be looking at in the live data other than the sensor voltages?
  15. So if the sensor sends signal back saying the combustion was too lean or too rich the ECU/ECM is supposed to make adjustments to try and make the combustion optimal and if something is to not work for example a malfunctioning sensor, or MAF problem, vacuum leak etc then the readings will continuously be wrong leading to a engine management light etc is that correct?