Grant Baker 18 Report post Posted April 3 Hi Customer has brought me an EVO 8 to fit a plugin G4+ and he has fitted an Innovate MTX-D Oil Pressure / Temp gauge. He's not keen on fitting "more sensors" to the car, so wants us to use the gauge output... Easy you say? Well no... It's not got analogue outs! Only the MTS Data stream. So, I'm guessing the MTS stream is not able to be input to the G4+, therefore I need to piggy back the pressure and temp sensors. Anybody done this? Any tricks needed? Quote Share this post Link to post Share on other sites
Richard Hill 38 Report post Posted April 3 I have piggy backed several sensors, pin the sensor signal wire into an analogue volt input. Select a suitable calibration type (often linear for pressure and table for temperature) , then run the sensor up as high as possible and note the calibrated reading on the gauge versus the voltage in pc link. Linear sensors will be ratiometric. For non linear sensors I create a spreadsheet and then curve fit the temperature data . It often exhibits a logarithmic response. HTH, Richard. Quote Share this post Link to post Share on other sites
Grant Baker 18 Report post Posted April 3 Great - thanks. Temp sensor into an AN Volt as well?? Quote Share this post Link to post Share on other sites
Adamw 586 Report post Posted April 4 Actually it's not possible to share sensors with MTX-D, it does something fruity measuring all sensors using a single ADC and switches the pull-up on/off when it takes the measurement. See this post for more info: Quote Share this post Link to post Share on other sites
Stower93 0 Report post Posted November 16 So is it possible to just run the sensors straight to the ecu? Without the use of the gauges. If so, would any settings need to be changed when you switch the an channel on? Like the calibration, an low, high and error values?? Quote Share this post Link to post Share on other sites
Adamw 586 Report post Posted November 16 Is yours the newer one with the 3 wire pressure sensor or the older 2 wire one? Quote Share this post Link to post Share on other sites
Stower93 0 Report post Posted November 17 Pressure sensor is 3 wire and temp sensor is 2 wire Quote Share this post Link to post Share on other sites
Stower93 0 Report post Posted November 20 So would the senors be ok to use? Wouldnt mind hooking them up so i can get some data Quote Share this post Link to post Share on other sites
Adamw 586 Report post Posted November 20 Yes, although the calibration is unknown so you will have to do some trial and error to work out the calibrations. The temp sensor will likely use the AC Delphi calibration. Pressure sensor will need to be wired to 5V, sensor ground and an analog input (pinout unknown but should be able to work it out from gauge wiring). Temp sensor will be wired to sensor gnd and a temp input (either way around). Quote Share this post Link to post Share on other sites