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rusefi / hellenNA6_issues

This is repository for public issue tracking of private HellenNA6 board
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Wideband input inop #29

Closed BeerMoneyMotorsports closed 2 years ago

BeerMoneyMotorsports commented 2 years ago

Support Log

Hellen 64 rev B.
External wideband Input channel- PA0/ADC_0 Board power- 12v bench supply

TS displays 0 volts with nothing connected for Raw EGO.
No visible board issues.
Switching to different input (PA1) shows normal operation of ~5v with nothing connected.

Tune- https://rusefi.com/online/view.php?msq=1048 Log- https://rusefi.com/online/view.php?log=855 Link for schematic- https://github.com/rusefi/rusefi/wiki/Hardware/Hellen/hellen64_miataNA6_94-b-schematic.pdf

rusefillc commented 2 years ago

all units or just one unit? all sensors or just one random sensor? do you have a reference good unit and reference good sensor?

local or remote?

BeerMoneyMotorsports commented 2 years ago

single unit no sensor connected currently. was tested previously in the lemon with its sensor. Local in hand.

Reference good unit shows ~5v with no sensor connected as expected.

BeerMoneyMotorsports commented 2 years ago

I followed the schematics. found what might have been a poor solder joint on R117. I applied some solder to it. I also found what appeared to be a blob of dried flux on the PA0 pin of the STM32. Removed it as well and now it works as expected. Confirmed functionality in the lemon.

rusefillc commented 2 years ago

Jlc fab defect?

BeerMoneyMotorsports commented 2 years ago

yes, jlc fab defect. do we have a way to feed this back to them?