One thing I haven't noticed in my browsing on 5/6mt swaps is tuning. Have any of you encountered issues running a manual trans on an auto ecu when it comes to being tuned?
Bumping a bit of an old Thread from the OPs last response but I was wondering if I could get a clarification on the above info?clutch switch
i used this so i can start the engine like on any other MT vehicle. from the clutch switch, i ran a couple wires down to pins 11 and 12 of the 4EAT inhibitor switch harness. this is to mimic Park/Neutral. (this is the only separate wiring i ran. i'm sure i could have used existing wiring like i did with my vss process, but that idea came later. and there were enough wires left to do so.)
neutral safety switch (nss)
reverse switch and nss are joined to a 4-pin connector. i repinned 1 and 3 to pins 1 and 4 of the 4EAT inhibitor switch harness coupler.
I retained CC, but lost ABS. but I now have an entire MT bulkhead harness in.So from reading this - it seems like some conversions retain cruise control but ABS is non operational for every swap?
It feels exactly like this happens to mine. When I clutch in and put it in neutral to come with a stop, the RPMs plummet and it sometimes stalls, but sometimes catches itself.another was when the clutch was depressed between shifts, it was as if fuel was getting cut off.
none here. SRS light or ABS light?finished up my 4eat to 6mt swap on my04 and now I have a p0600 and the airbag light on . Any of you have any of these after the swap?
so does this wire need to be grounded on the AT ecu? That should fix my problem if so .since i'm now running an originally 5MT ECU (even though both sets of AT and MT maps are on all the ECUs) still with the 4EAT bulkhead harness, the 5MT ECU requires pin 34 of plug 134 (first plug on the left) to be grounded. pin 19 of plug 136 for the non-turbo 5MT ECU. i don't really understand how for the earlier subarus they refer to it as an identifier switch. i don't see that anywhere on the FSMs. it just seems like the MT ECUs just has an extra slot where ground needs to be (without any description) because the ATs and MTs are just wired a little differently. and it seems the older subarus were able to get away with being less fussy because they have more leeway than the newer, pickier subarus. i'm sure it's mostly an emissions thing.
no crazy fans and raised idle speeds as though i'm driving when i'm really idling. no switching back and forth between the ECU thinking i'm parking and driving while clutching and shifting gears. and no annoying CEL + blinking 'curse' light because the 4EAT is still looking for the TCM. no loopy engine RPMs when coming to a stop because the ECU thinks it's in Drive yet the shifter contradicts by saying it's in Neutral and then just dies (a few times) because the RPM dipped too low. this shiz was scary when i couldn't stop the car (no booster assist) from rolling forward, dodging a car in front of me.
(i really have ~40K mi less. i swapped to a 5MT gauge cluster.)
i got to test CC on a long stretch. worked both downhill and back uphill.
you can try. but in my case, there was no difference. even when mine was grounded, my AP still recognized it as a 4EAT ECM. I later removed the ground, then shortly after, swapped in a MT ECM. I now have the entire MT dash bulkhead harness.so does this wire need to be grounded on the AT ecu? That should fix my problem if so .