Cutting the diag/idle trimpot out of circuit w/ fitting USB
Posted: Thu Jul 26, 2007 7:47 pm
Hey Guys/Matt ![Very Happy :D](./images/smilies/icon_biggrin.gif)
In your instructions you state to cut/remove the idle/diag trim pot when installing USB socket on these type 1 boards.
I done a test and when the pot is full counter clockwise the trim pot is 0 ohm resistance and more when rotated clockwise to add idle rpm and eventually entering diagnostic mode.
In diagnostic mode there is a 25rpm added to base idle rpm.
Would it be better to just join the wires when removing pot to keep the lower idle, as it should be set in the software anyway.
Or do you need to keep the ecu in diagnostic mode to retrieve the fault codes in the software?
I joined the two wires when i installed the board, but haven't actually looked if I can retrieve the fault codes throught the software yet.
Regards
Mick
![Very Happy :D](./images/smilies/icon_biggrin.gif)
In your instructions you state to cut/remove the idle/diag trim pot when installing USB socket on these type 1 boards.
I done a test and when the pot is full counter clockwise the trim pot is 0 ohm resistance and more when rotated clockwise to add idle rpm and eventually entering diagnostic mode.
In diagnostic mode there is a 25rpm added to base idle rpm.
Would it be better to just join the wires when removing pot to keep the lower idle, as it should be set in the software anyway.
Or do you need to keep the ecu in diagnostic mode to retrieve the fault codes in the software?
I joined the two wires when i installed the board, but haven't actually looked if I can retrieve the fault codes throught the software yet.
Regards
Mick