Giannis Posted January 24, 2023 Share Posted January 24, 2023 As the title I m looking some info about 4pin to 3 pin conversion and If anyone already done it Also what parts I need Thanks Quote Link to post Share on other sites
ste91 Posted January 24, 2023 Share Posted January 24, 2023 (edited) If using OEM Toyota sensors you will need the corresponding throttle body as well as the sensor and plug, as the mechanism that goes into the sensor is slightly different. I can't remember off the top of my head what the wiring is, but the diagrams are easy enough to find online, I did basically the reverse of this (3 to 4 pin) to use the 4 pin as my ECU requires a variable TPS. I think this is the standard 3 pin: top/yellow: TPS signal middle/brown and white: ECU ground bottom/black and red: throttle closed Your 4 pin auto TPS has a 5v feed which is now redundant, so you just have to check diagrams and see which order these three go. Edited January 24, 2023 by ste91 Quote Link to post Share on other sites
Giannis Posted January 24, 2023 Author Share Posted January 24, 2023 5 hours ago, ste91 said: If using OEM Toyota sensors you will need the corresponding throttle body as well as the sensor and plug, as the mechanism that goes into the sensor is slightly different. I can't remember off the top of my head what the wiring is, but the diagrams are easy enough to find online, I did basically the reverse of this (3 to 4 pin) to use the 4 pin as my ECU requires a variable TPS. I think this is the standard 3 pin: top/yellow: TPS signal middle/brown and white: ECU ground bottom/black and red: throttle closed Your 4 pin auto TPS has a 5v feed which is now redundant, so you just have to check diagrams and see which order these three go. Thanks for all the useful info My plan is to change my glanza at ecu with a jam pnp ECU My problem is the jam ECU is a mt So I m trying to find what I must modify to install jam ecu Quote Link to post Share on other sites
gorganl2000 Posted February 7, 2023 Share Posted February 7, 2023 i'll give you my experience. i have an EP91 glanza...it was originally automatic with the 4 pin TPS and 4efte A/T ECU,,, i converted it to manual shortly after buying it and kept the 4 pin TPS and A/T ECU,,,this worked without any issues. at some point afterwards, i bought a JAM M/T ECU and installed, keeping the 4 pin TPS....the car operated/worked without any issues; however, it would give a code for the TPS whenever i ran a diagnostic. Quote Link to post Share on other sites
Giannis Posted February 10, 2023 Author Share Posted February 10, 2023 On 2/7/2023 at 5:43 PM, gorganl2000 said: i'll give you my experience. i have an EP91 glanza...it was originally automatic with the 4 pin TPS and 4efte A/T ECU,,, i converted it to manual shortly after buying it and kept the 4 pin TPS and A/T ECU,,,this worked without any issues. at some point afterwards, i bought a JAM M/T ECU and installed, keeping the 4 pin TPS....the car operated/worked without any issues; however, it would give a code for the TPS whenever i ran a diagnostic. Thanks for reply Any management light on? What about performance? And did you check air fuel mixure? Quote Link to post Share on other sites
gorganl2000 Posted February 14, 2023 Share Posted February 14, 2023 (edited) On 2/10/2023 at 12:24 PM, Giannis said: Thanks for reply Any management light on?......No What about performance?....it felt like a modest/moderate upgrade over the stock ecu on pump gas (90/95 ron locally from what i've researched). If you have better gas where you live, then you may get better performance than me And did you check air fuel mixure?....No see responses above Edited February 14, 2023 by gorganl2000 Quote Link to post Share on other sites
Giannis Posted February 14, 2023 Author Share Posted February 14, 2023 Anyone with experience in this ecu? Quote Link to post Share on other sites
gorganl2000 Posted February 15, 2023 Share Posted February 15, 2023 (edited) 19 hours ago, Giannis said: Anyone with experience in this ecu? https://www.toyotagtturbo.com/community/index.php?threads/who-runs-aftermarket-ecus.2718/page-2 may be that tread can be useful about the JAM and other aftermarket ecus Edited February 15, 2023 by gorganl2000 Quote Link to post Share on other sites
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