1uz-fze Posted November 19, 2014 Report Share Posted November 19, 2014 Hi Everyone, I'm looking to use the the abs sensor on my Toyota R154 gearbox as a speed input for my ecu. Part number 89544-14020 I have wired it up but i am not getting any signal from it, so either i have a stuffed sensor or i have done something wrong (likely to be the latter) Here is a link to the sensor details: http://cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=BR&P=68, http://cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=BR&P=69 Here is the link to the ABS diagram of the supra http://cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=110 - please note wiring colour differences Currently i have +12v wired up to RR+ (white wire), RR- (black wire) to ground, Psen to My digital input. Stupidly I assumed the Positive and negative to be RR+ and RR- but on a 2nd look i am unconvinced. Any help Appreciated. Cheers, Luke. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 20, 2014 Report Share Posted November 20, 2014 Looking at the testing info I would say the the sensor should be wired, Psen to 12V, RR+ to Digital input (pull up turned on), and RR- to ground. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted November 20, 2014 Author Report Share Posted November 20, 2014 Thanks SImon, Will give that a try. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted November 20, 2014 Author Report Share Posted November 20, 2014 Hi Simon, speed sensor now operation, but when i bring up a basic gauge in VTS to show speed, its accurate until 95kmph and then the gauge starts from zero again and begins to work its way back up (like its gone once round).I am using the settings you described with a calibration number of 6150. I haven't had a chance to play with settings to much yet, but is this likely to be a the way the display gauge is setup, or due to the frequency being input being to high for the ecu? Tooth count is 44. Thanks. Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted November 20, 2014 Report Share Posted November 20, 2014 Hi, TRY right click on the gauge and select properties. Set from auto to manual and put MIN = 0 MAX = 300 or what ever you want the speedo to top out at. Regards Dave. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 20, 2014 Report Share Posted November 20, 2014 The frequency limit is 500Hz on the Di I suspect it is a firmware issue as the cal number you have is very big. More typical is around 200 What firmware are you currently running? Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted November 21, 2014 Author Report Share Posted November 21, 2014 Not the latest firmware, but i updated it not to long ago, but will update to latest and try again. Please note the sensor is on the output shaft and not the wheel (hence the high number)? It has 44 teeth so by my maths that's not many revs per second to get to the 500hz max? Cheers. Quote Link to comment Share on other sites More sharing options...
Sutkale Posted November 21, 2014 Report Share Posted November 21, 2014 Not the latest firmware, but i updated it not to long ago, but will update to latest and try again. Please note the sensor is on the output shaft and not the wheel (hence the high number)? It has 44 teeth so by my maths that's not many revs per second to get to the 500hz max? Cheers. This intrests me too since I am running 42 teeth ABS and I loose the speed at app. 250 kph. Rather annoying if running gear by boost and gear indicator jumps to 1st gear where boost setting is different than in 5th gear. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted November 21, 2014 Author Report Share Posted November 21, 2014 Is your sensor at your gearbox/before the diff or at the wheels? As Simon mentioned, what version of the firmware are you running? I haven't had a chance to go out and upgrade it/test it yet. Quote Link to comment Share on other sites More sharing options...
Sutkale Posted November 22, 2014 Report Share Posted November 22, 2014 Is your sensor at your gearbox/before the diff or at the wheels? As Simon mentioned, what version of the firmware are you running? I haven't had a chance to go out and upgrade it/test it yet. Running i88 ecu and sensor is located at wheels. Quote Link to comment Share on other sites More sharing options...
1uz-fze Posted November 23, 2014 Author Report Share Posted November 23, 2014 Upgraded to new firmware, but i watched the frequency of my DI as speed was building and at that certain point it just resets back to zero and starts counting again. Next time my gearbox is out I will remove some teeth, this should bring the frequency back and make it readable. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 24, 2014 Report Share Posted November 24, 2014 Yep getting that frequency under 500Hz is the key. This will also be the case for you Sutkale Quote Link to comment Share on other sites More sharing options...
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