Edmund T Posted March 8, 2020 Report Share Posted March 8, 2020 Hi all, I recently installed a Fury G4+ in a 1989 Skyline GTR R32. Motor is up and running and all is remaining is the TPS signal to the stock Atessa controller. I have been reading online that I can share the current TPS singal directly to the Attessa ecu and I will need to possibly output the TPS signal via the Fury AUX for the Attessa . The vehicle now runs on 2WD as the TPS signal is not connected to the Attessa ECU. I have attached a diagram of the Attessa ecu pinouts. There are 2 TPS input signals. Can someone advice what is the best way to get the TPS signal to the Attessa unit for it to function? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 9, 2020 Report Share Posted March 9, 2020 You cant just share the TPS signal as the attessa ecu loads the circuit up too much and messes up the TPS signal. One the GTR plug-in ECU's there is an op-amp circuit on board to generate this signal. I cant read your diagram but the relevant signal is the one that connects to pin 56 on the engine ecu. I think you could probably do it with a GP PWM output but it will probably need a pull-up and a small resistor/capacitor filter to smooth it out into a more analog looking signal. Which aux outputs do you have spare? Quote Link to comment Share on other sites More sharing options...
Edmund T Posted March 9, 2020 Author Report Share Posted March 9, 2020 Thanks ! I have Aux 7 -10 spare that I can use for the gp pwm output. I am not sure how big a resistor would be needed for this. Any advise is much appreciated. Cheers, Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 10, 2020 Report Share Posted March 10, 2020 Only aux 1-8 can do PWM so 7 or 8 may do it. Let me have a play on the bench when I get a minute to see if I can come up with something that will work. Chase me again if you havent heard from me by the end of the week. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted March 10, 2020 Author Report Share Posted March 10, 2020 Awesome, thanks ! Quote Link to comment Share on other sites More sharing options...
Simon Posted March 11, 2020 Report Share Posted March 11, 2020 If you were to make a buffer circuit this is what we are doing on the plugins. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted March 12, 2020 Author Report Share Posted March 12, 2020 Thanks Simon!. I will work to build this. I will update this thread on how I go. Thank you! Quote Link to comment Share on other sites More sharing options...
Edmund T Posted March 12, 2020 Author Report Share Posted March 12, 2020 HI Simon, I found this from Haltech https://www.haltech.com/product/ht-038001-nissan-attesa-4wd-tps-adaptor/. Would this be the same purpose? Quote Link to comment Share on other sites More sharing options...
Simon Posted March 13, 2020 Report Share Posted March 13, 2020 That I suspect is as above but all packaged ready to go. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted August 27, 2020 Author Report Share Posted August 27, 2020 Hi Simon, I need some advice to enabling the Atessa 4WD with the Fury ecu. I have wired in the Haltech 4wd adapter to boost the TPS signal to the Atessa 4wd ecu . With this GTR 32, we have removed the stock cluster and replaced it with a AIM dash. I also noticed that I need to run a rpm input signal to the Atessa. I now need to push a rpm output from the Fury to the Atessa 4wd ecu. Can I use the spare INJ 7 output a 'tacho' signal for this? Tacho configuration should look like this ; Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 A normal aux output will be easier as they have a pull-up resistor built-in. The injector drives dont have a pull-up so I suspect you will need to add an external one if you use it for the tacho signal. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted August 27, 2020 Author Report Share Posted August 27, 2020 Adam, Thanks for this. I will give it a try today and let you know. Cheers Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted August 27, 2020 Report Share Posted August 27, 2020 On 3/13/2020 at 10:09 AM, Edmund T said: HI Simon, I found this from Haltech https://www.haltech.com/product/ht-038001-nissan-attesa-4wd-tps-adaptor/. Would this be the same purpose? I use this in my r32 gtr with link fury with great success Quote Link to comment Share on other sites More sharing options...
Edmund T Posted August 28, 2020 Author Report Share Posted August 28, 2020 Thanks Michael. My last challenge is trying to get a vehicle speed from the wheel speed sensors. I checked the resistance of the wheel speed sensors and they are within spec 1.3-1.4 K ohm. I connected the wheel speed sensor to a digital input and the other to the ECU sensor ground. However, I cant seem to get a reading. I swapped them over and still no luck. I must be missing something. Di3 configured as below for reference. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted August 28, 2020 Report Share Posted August 28, 2020 The factory speed input into the ECU comes from the dash cluster and is a converted version of the gearbox speed signal (at least that's how it was from factory in my stagea). If you don't have the factory dash cluster anymore you can run the gearbox speed sensor straight into the ECU but it will need a different calibration number (think I was more like 500 from memory) and you will want the pullup off as the gearbox sensor is a 2 wire VR sensor. If you have wired up one of the abs sensors to the ECU this will most likely screw with the 4WD and ABS system as they both use the ABS wheel speed sensors. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted August 30, 2020 Author Report Share Posted August 30, 2020 Hi Vaughan , As I understand, the R32 factory speed input from gearbox drives an old style speedo cable. It is different from the R33 and R34. As for wheel speed, I tapped the wheels speed sensor (LR) from the connector to the 4wd Atessa ecu. I havent been succesfuly to get a good reading. I dont the signal is strong enough. Currently without the cluster, there is no 'vehicle speed'. This is required for the ABS, Atessa and HiCAS. I need to find another way to get vehicle speed. I read online that the R33 speed sensor from the transmission can be installed in the R32 box. I will investigate further on this alternative too. Any advice will be much appreciated. Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 30, 2020 Report Share Posted August 30, 2020 The ABS sensor should work connected direct to a DI, the pull-up will need to be off. The DI needs to see a bit over 1V so ABS sensors often wont reach that level and start working until over about 20kmh. Did you reach that speed when testing? But yes, the R33 VSS would be a better option as you may exceed the max frequency of the DI at high speed with an ABS sensor too. Quote Link to comment Share on other sites More sharing options...
Edmund T Posted September 3, 2020 Author Report Share Posted September 3, 2020 Adam, Thanks for this. I will test the ABS sensors to the Di3 again and will turn off the pull up. From the ABS sensor wires, I taped one of them to the Di3 and the other to the Fury's ecu sensor ground. Cheers, Quote Link to comment Share on other sites More sharing options...
coupe-r Posted September 10, 2020 Report Share Posted September 10, 2020 Regarding the TPS output sensor that Haltec offers, did you notice it Specifically says for R34? I assume its a 1:1 TPS output scale. https://www.haltech.com/product/ht-038001-nissan-attesa-4wd-tps-adaptor/ R32/33 seem to input to the 4WD ECU at a scale of 2/3 or so the Link manual states this? I assume when using a scale of 1:1 then the 4WD ECU of the R32 will see MORE TPS voltage than it usually would for a given throttle angle. Unsure the effects of this, but maybe MORE is sent to the front wheels than normally would be? What say you Link Gurus? Quote Link to comment Share on other sites More sharing options...
Vaughan Posted September 10, 2020 Report Share Posted September 10, 2020 R34 GTR was compared against the display that they have, my Stagea (WGNC34 Series 1 wih RB25DE S2 motor and auto box, Grey Plug ECU but not a NEO) had a 1:1, if you want to be sure for a particular car would be best to check with the factory computer and a multimeter with the engine off. I think I may have heard that there is a difference between auto and manual so any additional information to add to the manual would be helpful. using 2:3 instead of a 1:1 on a 1:1 car will result in a lower tps signal which should theoretically mean less power to the front wheels but the factory accelerometer/s signal might result in 50:50 in that situation anyway. Quote Link to comment Share on other sites More sharing options...
coupe-r Posted September 10, 2020 Report Share Posted September 10, 2020 Yup exactly, except when using a 1:1 converter when the 4wd Ecu expects 2:3 results in MORE TPS voltage... ill measure with a multimeter. link guys know else they wouldn’t have made the dip switch, I’m waiting for their guru input. Quote Link to comment Share on other sites More sharing options...
jasaircraft Posted October 18, 2022 Report Share Posted October 18, 2022 On 3/11/2020 at 3:51 PM, Simon said: If you were to make a buffer circuit this is what we are doing on the plugins. Hello is there an alternative mc part or circuit for these matter(cant find this mc in my country)? Is that "scap 100n 50v 080510%x7r" refering to one part (capacitor)? Having the same issue here on a r32 gtr. Also how should the two fuelpump voltage controller signals be? Thanks Jose On 9/10/2020 at 3:08 AM, coupe-r said: Yup exactly, except when using a 1:1 converter when the 4wd Ecu expects 2:3 results in MORE TPS voltage... ill measure with a multimeter. link guys know else they wouldn’t have made the dip switch, I’m waiting for their guru input. How did your setup end up? Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 19, 2022 Report Share Posted October 19, 2022 Both C1 & C2 are the same type of capacitor - 100nF, 50V. Can you get a MCP601? Quote Link to comment Share on other sites More sharing options...
jasaircraft Posted October 19, 2022 Report Share Posted October 19, 2022 12 hours ago, Adamw said: Both C1 & C2 are the same type of capacitor - 100nF, 50V. Can you get a MCP601? So after walking around i couldnt find mcp601 either I found a mcp230 Quote Link to comment Share on other sites More sharing options...
jasaircraft Posted October 19, 2022 Report Share Posted October 19, 2022 I think i will just have to import mc33502d that takes quite a while... Quote Link to comment Share on other sites More sharing options...
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