brad,
They all used the same motronic ECU: Bosch 0261200117 or 60543462
S is the different ECU.
Jason
brad,I think I've read here previously that folks have successfully swapped in the Motronic from an automatic-equipped car to a 5-speed, is that correct? I seem to recall too that there may have been some issues, though I'm not recalling any details.
Any way, assuming that the above is true (please feel free to tell me it's not), what if I replaced the calibration EPROM (after-market or stock), from the 5-speed Motronic into the Automatic Motronic? Would I essentially have a 5-speed Motronic at that point?
I guess what I'm really asking is are any/all differences between the Auto and 5-speed Motronic addressed via the calibration EPROM?
Thanks Jason. Are you suggesting that even the calibration EPROM is the same between the 5-speed and Automatic cars?They all used the same motronic ECU: Bosch 0261200117 or 60543462
S is the different ECU.
Hey Brad,Thanks Jason. Are you suggesting that even the calibration EPROM is the same between the 5-speed and Automatic cars?
For clarity, I should add that I'm just talking about the '91- '93 12V cars here.
Interesting... I wonder if that's just to engage the kick-down function, or does it actually cause a different set of functions to engage in the software.Brad see page 597 and 601 in wiring diagrams pin 11 of ECU is jumpered to ground G131at S25 red connector pin 1 to pin 2 for 5-speed and not jumpered for A/T.
Both ECUs are -117 so it is jumper that makes difference.
Looking closer at the diagrams I still think they are all the same regardless unless I am missing something?Interesting... I wonder if that's just to engage the kick-down function, or does it actually cause a different set of functions to engage in the software.
The good news is that I can grab the ECU from an Automatic car and have a useable spare.
I don't doubt that they are swap-able and functionally equivalent, but what I question is whether the calibrations are 100% identical between the 5-speed and automatic. It's not a big deal - just a curiosity thing more than anything, as every other vehicle I've worked with have different calibrations for the automatic and manual transmission versions of the same car.Brad do a plug and play and move on AS THE BOSCH MOTRONIC ECU 0 261 200 117 is correct
OBTW there is another feature piggy backed onto system in A/T cars using pin 28 of ECU -117 to read signal from relay I62 for selected gear signal in A/T models see page 786 in wiring diagrams. relay is deenergized in all gears and energized in P-N. When deenergiized it sends 12v signal to pin 12 for smooth gear engagement so that maybe how they programmed system outside the ECU BOX.I don't doubt that they are swap-able and functionally equivalent, but what I question is whether the calibrations are 100% identical between the 5-speed and automatic. It's not a big deal - just a curiosity thing more than anything, as every other vehicle I've worked with have different calibrations for the automatic and manual transmission versions of the same car.
I'm not forgetting about the jumper, but I've never seen a jumper used to execute different software, just hardware.