Link2ThePast Posted November 27, 2022 Report Share Posted November 27, 2022 Hi guys, looking for some guidance and possibly a solution. I've finished adapting a BMW S54 throttle actuator to my 2zz and am using it to drive 4age blacktop throttles. The throttles are unmodified and have their return springs intact. The same can be said with the actuator. Currently when trying to calibrate the TPS, the system starts to go through the process, completes the first closed/opened sweep of the throttle plate. At the end, the test says that it's closing the TB again but doesn't, and it give the message that H-Bridge polarity is reversed. This happens regardless if I change the output state to high or low for aux9. I was previously using the same wiring setup to drive a stock E-throttle so I know the wiring isn't the issue on the ECU side. I've switched the sensor pins on the TPS plug because it was originally opening the throttle when the calibration was closing it and that fixed that error but I am stuck at what to do. Any help would be greatly appreciated I've scoured the internet trying to figure out what the issue is here and only came across this post which describes exactly what I am experiencing: https://forums.linkecu.com/topic/13879-tps-calibration-issues/ I just made a log and will be going through that in the mean time. Here is the link for the Log and Cal. Log is dated for todays date in PST and the cal is named "itb e throttle" https://drive.google.com/drive/folders/1CiPYR6NEtvaxv4rIjn_7SoY6Vur5pgp1?usp=sharing Quote Link to comment Share on other sites More sharing options...
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