E90Post
 


European Auto Source
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > JB BMS USB Cable Pinout



Reply
 
Thread Tools Search this Thread
      01-30-2012, 12:09 PM   #1
wetwillyskate
New Member
wetwillyskate's Avatar
United_States
1
Rep
24
Posts

Drives: 2011 335i MT
Join Date: Jan 2012
Location: Greenville, SC

iTrader: (0)

JB BMS USB Cable Pinout

I searched all of the E90+ forums i know for a pinout of this "JB BMS USB Cable" and i couldn't find a thing. So i was stuck buying it for $35.

Step 1) Buy everything you need from a site like Mouser or Digikey

buy a TTL RS232 cable (5V) for $20

http://www.mouser.com/ProductDetail/...52bZBasxjZs%3d

buy a DB9 Male (pins not sockets) for $0.43.
If you're like me you have these in your parts bins already

buy a clamshell for $0.65 (or buy a nicer metal one for $2)

http://www.mouser.com/ProductDetail/...RQEfBJiA%3d%3d

Step 2) solder the black wire to pin 5 of the DB9 Male

Step 3) solder the red wire to pin 3 of the DB9 Male

Step 4) solder the yellow wire to pin 1 of the DB9 Male

Step 5) assemble clam-shell and you're done!

I know this only saves $10-$15, but the principle of the matter is that you shouldn't charge more for something by playing on the ignorance of your customers.
Appreciate 0
      03-03-2014, 09:03 PM   #2
teamyamaha91
New Member
United_States
0
Rep
9
Posts

Drives: 2011 335i xDrive Coupe
Join Date: Feb 2014
Location: West Milford, NJ

iTrader: (0)

Correct me if I am wrong, but would that only be vcc, gnd, and rx? How would we transmit without the TX line?

I am also trying to make my own cable and was able to trace on the jb4 pin 3 as RX, pin 1 as TX, and pin 9 as an unknown for me. I was not able to find any other pins that actually go anywhere on the jb4 board.
Appreciate 0
      03-03-2014, 10:26 PM   #3
Chocolate Apocalypse
Private
0
Rep
88
Posts

Drives: 2011 335i
Join Date: Dec 2013
Location: Las Vegas, Nv

iTrader: (4)

Looks like yellow(1), orange(3) then black(5) here:

http://www.e90post.com/forums/showthread.php?t=359363
__________________
2011 335i - New toy
2010 Chevy Equinox - Beater
1972 Cutlass - turbo LS project underway
Appreciate 0
      03-05-2014, 10:01 PM   #4
Chocolate Apocalypse
Private
0
Rep
88
Posts

Drives: 2011 335i
Join Date: Dec 2013
Location: Las Vegas, Nv

iTrader: (4)

I can attest to the yellow, orange and black wires doing the trick. Just upgraded my BMS CAN tool with my homemade serial to USB cord
__________________
2011 335i - New toy
2010 Chevy Equinox - Beater
1972 Cutlass - turbo LS project underway
Appreciate 0
      03-12-2014, 09:50 PM   #5
Maniac0908
Captain
Maniac0908's Avatar
United_States
18
Rep
715
Posts

Drives: Alpine White 07 335xi Sedan
Join Date: Feb 2013
Location: Silver Spring,MD

iTrader: (2)

Does anyone know which wires are which? Im guessing black is ground. But which is tx and rx?
Appreciate 0
      12-02-2015, 05:51 AM   #6
Grootkop
Registered
0
Rep
1
Posts

Drives: E90 320I
Join Date: Nov 2015
Location: South Africa

iTrader: (0)

JB4 USB cable hack

The cable is a USB to serial converter TTL 5 vdc
The pictures are simple enough to follow black is ground negative
and the orange and yellow are transmit and receive
Attached Images
     
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:32 PM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST