IDIOT QUESTION: How do I know if I have JB4 G5 ISO?

sirdaft1 · 02-19-2015, 11:39 AM

When I originally bought my 335 the PO had already installed JB4. That said, I've always been curious to know whether I'm running the latest JB4 G5 ISO processor. Pardon what might be a ridiculously stupid question, but is there a way to easily find out what I have?

blisstik · 02-19-2015, 11:54 AM

There are two resistors taken out from the board.

335NJ · 02-19-2015, 11:59 AM

ferocity02 · 02-19-2015, 12:00 PM

Read: http://www.n54tech.com/forums/showthread.php?t=17441

There are two diodes that are missing to make it "ISO" aka isolated. Look at the board and the arrangement of components to make sure its a "G5".

musc · 02-19-2015, 12:17 PM

One way to quickly know if you have a G4 is go through your steering wheel menus. If it stops at Menu 8 then you don't have G5.

sirdaft1 · 02-19-2015, 01:09 PM

Perfect, thanks all!

dangdude · 01-05-2019, 11:34 AM

After lots of googling, this is the best thread I found.
Is there such a thing as G5 not-ISO?
If so, can the G5 board be modified to make it ISO?

02-19-2015, 11:39 AM	#1
sirdaft1 Brigadier General 2251 Rep 3,353 Posts Drives: F85 X5M Join Date: Feb 2013 Location: Chicago West Burbs iTrader: (9) Garage List 2016 BMW X5M [9.00] 2012 BMW X5 35i (SOLD) [9.67] 1989 BMW 325i Track ... [10.00] 2007 E90 WTCC Wideb ... [8.50]	IDIOT QUESTION: How do I know if I have JB4 G5 ISO? When I originally bought my 335 the PO had already installed JB4. That said, I've always been curious to know whether I'm running the latest JB4 G5 ISO processor. Pardon what might be a ridiculously stupid question, but is there a way to easily find out what I have?
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02-19-2015, 11:54 AM	#2
blisstik Lieutenant Colonel 159 Rep 1,677 Posts Drives: E92 Join Date: Jul 2009 Location: California iTrader: (14)	There are two resistors taken out from the board.
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02-19-2015, 11:59 AM	#3
335NJ Colonel 535 Rep 2,872 Posts Drives: 2008 335i 6MT E90 Join Date: Feb 2014 Location: NJ/Philadelphia Suburbs iTrader: (1)
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02-19-2015, 12:00 PM	#4
ferocity02 Colonel 553 Rep 2,085 Posts Drives: 2013 135is Join Date: May 2014 Location: USA iTrader: (8)	Read: http://www.n54tech.com/forums/showthread.php?t=17441 There are two diodes that are missing to make it "ISO" aka isolated. Look at the board and the arrangement of components to make sure its a "G5". __________________ 2013 135is DCT Carbon Black Metallic
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02-19-2015, 12:17 PM	#5
musc Free T_e_r_r_Y :) 223 Rep 1,706 Posts Drives: X3MC, Audi TTRS MK3, 335is DCT Join Date: Dec 2006 Location: Charleston, SC iTrader: (9) Garage List 2023 BMW X3MC [10.00] 2011 BMW 335is [10.00]	One way to quickly know if you have a G4 is go through your steering wheel menus. If it stops at Menu 8 then you don't have G5.
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02-19-2015, 01:09 PM	#6
sirdaft1 Brigadier General 2251 Rep 3,353 Posts Drives: F85 X5M Join Date: Feb 2013 Location: Chicago West Burbs iTrader: (9) Garage List 2016 BMW X5M [9.00] 2012 BMW X5 35i (SOLD) [9.67] 1989 BMW 325i Track ... [10.00] 2007 E90 WTCC Wideb ... [8.50]	Perfect, thanks all!
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01-05-2019, 11:34 AM	#7
dangdude Fixing stuff is fun. 15 Rep 26 Posts Drives: 07 335i 6MT, e46 zhp, z3mr Join Date: Oct 2016 Location: St. Louis MO iTrader: (0)	After lots of googling, this is the best thread I found. Is there such a thing as G5 not-ISO? If so, can the G5 board be modified to make it ISO? __________________ 07 monaco blue / saddle. Stoptech BBK, Dinan stage 3 suspension, software. Dinan LSD, oil cooler, CAI, intercooler, exhaust. VRSF silicone inlets, ER CP, AR 3" ceramic DPs.
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