1uz-fze Posted December 19, 2012 Report Share Posted December 19, 2012 Hi guys, having some issues with my cam sensor triggers on my Toyota v8, 1uz vvti model. I have attached an image in the error counters etc from a 15 min or so drive. It appears that the errors tick up under deceleration and idle, but not when on load. I have also just noticed after reviewing the image that my Bat voltage is 11.8, could this cause the issues? Also left bank picked up one error,and trig 1, is this acceptable? Also Inlet RH status shows Error 3rd cam pulse. Amongst reading other threads i see similar issue on a bmw motor, and he mentions he switched the pullup resister in the digital input to on and that fixes his problems. Is this a wise idea to have a go at as the help file mentions to have it set to off for a reluctor pickup? Any help would be appreciated. Cheers, Luke Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted December 19, 2012 Report Share Posted December 19, 2012 Hi Luke, can you please post how you have configured the software for your triggers and your VVT setup. It will help us be able to diagnose your issues. Regards Dave. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 19, 2012 Report Share Posted December 19, 2012 We have one of these as our test mule engine so if you can post up your VVT settings we will be able to tell if anything is really out. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted December 19, 2012 Author Report Share Posted December 19, 2012 Originally its a basemap file from the link g4 software, so i think they should be alright. I will upload the pcl file tonight for you to take a look at and hopefully you can take a look before you close up for the year! Cheers, Luke. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 19, 2012 Report Share Posted December 19, 2012 That should be a good starting point. One are that can cause problems is if the polarity on any of the sensors is incorrect. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted December 20, 2012 Author Report Share Posted December 20, 2012 Pretty sure i have them all correct polarity but will double and then triple check, Here is a link to the pcl file. https://docs.google.com/open?id=0B5CedNCRyvpBNnI4ZElLbDR4MDQ Cheers. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 21, 2012 Report Share Posted December 21, 2012 Looking at the settings they are what we have on our motor. I would start by working through the cam test function to check where the teeth are. It could be the cam timing is different and your offsets need to be different. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted February 7, 2013 Author Report Share Posted February 7, 2013 So here is some screen shots from the cam test, not sure if they are correct? Cheers, Luke. Quote Link to comment Share on other sites More sharing options...
Simon Posted February 7, 2013 Report Share Posted February 7, 2013 Looking at those figures your offsets need to be LH cam 60 RH cam 146 Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted February 28, 2013 Author Report Share Posted February 28, 2013 Had the motor on a 4 channel scope today, Top channel is LH inlet cam Di 1 2nd is RH Cam Di 2 (problem sensor) 3rd is left cam angle sensor Bottom is crank. I have not seen any other captures of the vvt part of a 1uz before, but it looks to me as if my cam timing may be a tooth out? Simon what is your opinion on this?? Cheers, Luke. Quote Link to comment Share on other sites More sharing options...
Simon Posted February 28, 2013 Report Share Posted February 28, 2013 Cam signals look mint in shape and size, however the crank I would say is the incorrect polarity. I would remove the crank sensor and check with a piece of steel and the scope to see a rising voltage as the metal approaches the sensor and a falling as it moves away. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted February 28, 2013 Author Report Share Posted February 28, 2013 So you think the digital input signals are fine? it looks to me as if the pulses should line up with eachother and not be offset? Quote Link to comment Share on other sites More sharing options...
Simon Posted March 1, 2013 Report Share Posted March 1, 2013 The two cams are offset from each other. We are expecting the first tooth on the LH cam to be at 54deg and on the RH at 139 after TDC#1 Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted March 1, 2013 Author Report Share Posted March 1, 2013 Well fixing the crank angle polarity seems to have fixed it, now runs nice and smooth. Bit annoyed at myself for not realizing sooner, especially since it was one of the first things mentioned, but all is well now. Thanks for the help Simon, has been much appreciated. Cheers. Quote Link to comment Share on other sites More sharing options...
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