Hi,
I have a stock ST205 Celica with the G4+ plug in ECU.
The air conditioning doesn't work properly with the G4+, though does when I use the OEM ECU.
I haven't made any changes to the wiring, and don't plan to.
This video explains the issue - https://youtu.be/bNhyJxdSKT8
Changing the pull up setting doesn't fix the issue.
Please let me know what I should do.