car won't start after removing jb3 2.0!!!! help!

JohnSprm69 · 07-28-2010, 09:12 AM

i get a dsc malfunction message and malfunction in transmission message.

anyone know what could this be? car started fine 20 minutes before i removed the jb3

thanks for the input.

forza1976 · 07-28-2010, 09:19 AM

Quote:

Originally Posted by Johnsprm69

i get a dsc malfunction message and malfunction in transmission message.

anyone know what could this be? car started fine 20 minutes before i removed the jb3

thanks for the input.

Go re-verify the small sub connectors, they may be reversed and that will cause this behavior. Not sure if JB3 also has a power wire but check that if it does.

JohnSprm69 · 07-28-2010, 09:48 AM

anyone else???

FirstBMWLA · 07-28-2010, 09:55 AM

Everyone is going to say this but really check the wiring until you can say you
are 99.9% sure it's right.

There are pics of all the stock wiring harness on n54tech.com DIY section.
After you're sure the wiring is right I'd scan it for codes and delete any
from the previous issue you had and try it again.

I'm sure someone else from BMS will chime in but thats about all I could say to
do right now.

You'll figure it out. Don't stress too much.
Also was this a pinout or PNP removal? If it were PNP should be much simpler. Just make sure
orientation of subconnectors is correct. The have arrows on them and pin numbers to match up
with the larger DME connector.

fisherbln · 07-28-2010, 09:55 AM

You almost definitely hooked things up wrong when you took the JB3 harness out. The small connectors are the easiest to get wrong. Make sure you put them all in correctly (the arrow on the connectors should point inward) and in the correct spot in the ECU harness.

JohnSprm69 · 07-28-2010, 10:00 AM

damn i could swear i put everything correct. guess i'll have to check when i get home from work.

thanks guys

Alan l. · 07-28-2010, 10:03 AM

Also make sure the harness is completely seated into the socket. Sometimes it might seem like its in but it really isn't.

Mr. 5 · 07-28-2010, 10:05 AM

Quote:

Originally Posted by Alan l.

Also make sure the harness is completely seated into the socket. Sometimes it might seem like its in but it really isn't.

True.

onefastman · 07-28-2010, 10:08 AM

If it is pnp then should be something simple but if it is pin-out take pictures of each side of each harness and email them to terry. I messed up when I put the pin-out in and did the same thing. It turned out that I had pin 7 and 8 as opposed to pin 6 and 7.

Biggest thing is dont stress, it will get fixed soon.

JohnSprm69 · 07-28-2010, 10:19 AM

Quote:

Originally Posted by Alan l.

Also make sure the harness is completely seated into the socket. Sometimes it might seem like its in but it really isn't.

i believe this could be the problem, i had a little trouble sitting the large harness and it sat a little higher than the small harness but; since the slider thing locked in, i though it was fine.

will redo it when i get home.

Mike@N54Tuning.com · 07-28-2010, 10:31 AM

Definitely recheck the harness as I can guarantee something is backwards/swapped or loose. Common mistake is to swap the grey and black connectors on the small subconnector.

Mike

Shinchan · 07-28-2010, 10:46 AM

make sure you insert the wires into correct hole. It make look right.. but.. double check and count the it correctly.

fisherbln · 07-28-2010, 10:48 AM

Quote:

Originally Posted by Johnsprm69

i believe this could be the problem, i had a little trouble sitting the large harness and it sat a little higher than the small harness but; since the slider thing locked in, i though it was fine.

will redo it when i get home.

If you lift the ECU a little bit while you lock it down it will make it seat properly. It is very easy to have it sitting just above the socket since the side of the ECU compartment gets in the way when the ECU is sitting in its normal position.

caliguy562 · 07-28-2010, 11:10 AM

also you may want to try disconnecting and reconnecting the battery after you check over your connections. After I switch chips on my JB3 it wouldn't fire up for anything. I didn't disconnect the harness so I knew that wasn't the problem. However, once I reconnected the battery a second time, it fired right up. Had a few ecu related codes though, including transmission.

JohnSprm69 · 07-28-2010, 07:29 PM

thanks everyone for your input, problem is fixed already, dumb me had inverted one of the small connectors.

car is working perfectly fine.

07-28-2010, 09:12 AM	#1
JohnSprm69 Colonel 162 Rep 2,007 Posts Drives: AW e92 Join Date: Feb 2008 Location: Miami, FL iTrader: (4)	car won't start after removing jb3 2.0!!!! help! i get a dsc malfunction message and malfunction in transmission message. anyone know what could this be? car started fine 20 minutes before i removed the jb3 thanks for the input.
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07-28-2010, 09:48 AM	#3
JohnSprm69 Colonel 162 Rep 2,007 Posts Drives: AW e92 Join Date: Feb 2008 Location: Miami, FL iTrader: (4)	anyone else???
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07-28-2010, 09:55 AM	#4
FirstBMWLA Major 187 Rep 1,103 Posts Drives: 2007 335i Coupe Join Date: Oct 2007 Location: Dallas,TX iTrader: (11)	Everyone is going to say this but really check the wiring until you can say you are 99.9% sure it's right. There are pics of all the stock wiring harness on n54tech.com DIY section. After you're sure the wiring is right I'd scan it for codes and delete any from the previous issue you had and try it again. I'm sure someone else from BMS will chime in but thats about all I could say to do right now. You'll figure it out. Don't stress too much. Also was this a pinout or PNP removal? If it were PNP should be much simpler. Just make sure orientation of subconnectors is correct. The have arrows on them and pin numbers to match up with the larger DME connector.
	Appreciate 0 Quote

07-28-2010, 09:55 AM	#5
fisherbln Captain 12 Rep 859 Posts Drives: 2007 335i Coupe Join Date: Sep 2009 Location: USA iTrader: (2)	You almost definitely hooked things up wrong when you took the JB3 harness out. The small connectors are the easiest to get wrong. Make sure you put them all in correctly (the arrow on the connectors should point inward) and in the correct spot in the ECU harness. __________________ 2007 335i SG Coupe 2009 128i AW
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07-28-2010, 10:00 AM	#6
JohnSprm69 Colonel 162 Rep 2,007 Posts Drives: AW e92 Join Date: Feb 2008 Location: Miami, FL iTrader: (4)	damn i could swear i put everything correct. guess i'll have to check when i get home from work. thanks guys
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07-28-2010, 10:03 AM	#7
Alan l. Major General 5437 Rep 8,807 Posts Drives: 2020 F95 X5M Competition Join Date: Jun 2009 Location: United States iTrader: (9)	Also make sure the harness is completely seated into the socket. Sometimes it might seem like its in but it really isn't. __________________
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07-28-2010, 10:08 AM	#9
onefastman Major General 159 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	If it is pnp then should be something simple but if it is pin-out take pictures of each side of each harness and email them to terry. I messed up when I put the pin-out in and did the same thing. It turned out that I had pin 7 and 8 as opposed to pin 6 and 7. Biggest thing is dont stress, it will get fixed soon. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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07-28-2010, 10:31 AM	#11
Mike@N54Tuning.com Joint Chiefs of Staff 4912 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Definitely recheck the harness as I can guarantee something is backwards/swapped or loose. Common mistake is to swap the grey and black connectors on the small subconnector. Mike
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07-28-2010, 10:46 AM	#12
Shinchan LED Rules 59 Rep 789 Posts Drives: Sold: 335xi Coupe Join Date: Oct 2006 Location: Boston iTrader: (0)	make sure you insert the wires into correct hole. It make look right.. but.. double check and count the it correctly. __________________ LED Pimp... 13 Audi S4...
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07-28-2010, 11:10 AM	#14
caliguy562 Lieutenant 8 Rep 476 Posts Drives: E92 335i Join Date: Dec 2007 Location: garaged somewhere in soCal iTrader: (3)	also you may want to try disconnecting and reconnecting the battery after you check over your connections. After I switch chips on my JB3 it wouldn't fire up for anything. I didn't disconnect the harness so I knew that wasn't the problem. However, once I reconnected the battery a second time, it fired right up. Had a few ecu related codes though, including transmission.
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07-28-2010, 07:29 PM	#15
JohnSprm69 Colonel 162 Rep 2,007 Posts Drives: AW e92 Join Date: Feb 2008 Location: Miami, FL iTrader: (4)	thanks everyone for your input, problem is fixed already, dumb me had inverted one of the small connectors. car is working perfectly fine.
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