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rusefi / hellen-NB2-issues

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A lot of red LEDs in weird key position #20

Open rusefillc opened 3 years ago

rusefillc commented 3 years ago

https://youtu.be/AQJ1a1bx6Ms

https://youtu.be/CqRugC8O5cs

Sept 25 rev C video https://youtu.be/7NdbVU0hFXI

rusefillc commented 3 years ago

https://github.com/rusefi/rusefi/wiki/Mazda-Miata-2002#starting--power

rusefillc commented 3 years ago

https://www.autogenius.info/mazda-mx-5-2002-2004-fuse-box-diagram/ fuse 17 A/C is very relevant!

https://youtu.be/t5d0LfAeqgo

andreika-git commented 3 years ago

This issue was caused by the "A/C" LED's reverse diode powered from an external +12V from A/C, because the ignition key has two parallel +12V lines which are not exactly parallel, and A/C is powered before the ECU power. image

We don't know whether it is a Miata's bug or not, but we need to consider any of LS outputs as a potentially external power source.

And the solution would be to change the connection of reverse protection diodes from parallel to in series with their LEDs - should be in TODO for rev.D.

rusefillc commented 3 years ago

@andreika-git says there were changes in rev D

rusefillc commented 2 years ago

@BeerMoneyMotorsports I believe rev D is still affected

@BeerMoneyMotorsports please ship me a rev D if you ever get one

rusefillc commented 2 years ago

@BeerMoneyMotorsports did you have a chance to test on real NB2?

@BeerMoneyMotorsports how much do you care about this issue?

BeerMoneyMotorsports commented 2 years ago

i do not have nb2 to test on. I tried it on NB1 but could not reproduce. is @stefanst able to reproduce on NB2?

rusefillc commented 2 years ago

We need NB2 help while you still have it!

@stefanst do you have H72C or H72D?

BeerMoneyMotorsports commented 2 years ago

i tested on NB2, and two more NB1. i cannot reproduce the reported issue.