JB4 Fail COM1

Randomaccess335 · 05-12-2012, 10:29 PM

Didn't read all helpful comments........ But I get that alot cause my USB from the jb4 is loose fitting in to my laptop. I ordered an extension USB cable off eBay 15' for $4. I didn't run it through the glove box do to removal pain on the ass for dealer visits.

Anyway....... No more failed com for me

pavo335 · 05-12-2012, 11:37 PM

1 ensure you run the USB exe file on the laptop and

2. I must be really dumb cause I have installed the software on 3 laptops and I still forget to turn the ignition ON when connecting. After a bit of head scratching I remember and all good.

FoShizzle · 05-13-2012, 11:52 AM

I had this happen to me yesterday after update to the newest interface. I set my interface to the correct com (7) and it kept saying failure. I was about to take off the cowling and check my USB connection, but after I restarted my laptop it worked fine.

GTstunna612 · 02-17-2013, 10:21 AM

u have to adjust your COM settings, make sure you hook up the usb cable first before opening the JB4 interface

Cfitz · 10-24-2018, 12:13 PM

Experienced a connection issue on Windows 7 via Parallels on macOS.

After plugging the JB4 into my computer with the car completely off, Windows installed the drivers for it.

To fix this, I went into the "Devices and Printers" tab in Windows, right clicked the JB4 device (called "TTL232R" in my case), clicked Properties, clicked the "Change Settings" button, went to the "Port Settings" tab in the new window, clicked the "Advanced" button, selected "COM 1" for "COM Port Number" option, then saved everything.

Everything worked fine for me following this and I was able to update my JB4's firmware per usual instructions.

05-12-2012, 10:29 PM	#23
Randomaccess335 Captain 69 Rep 868 Posts Drives: 07' 335I Join Date: Mar 2011 Location: boynton beach, Fl iTrader: (11)	Didn't read all helpful comments........ But I get that alot cause my USB from the jb4 is loose fitting in to my laptop. I ordered an extension USB cable off eBay 15' for $4. I didn't run it through the glove box do to removal pain on the ass for dealer visits. Anyway....... No more failed com for me __________________ JB4 G5 ISO , AR DP's, DO Meth kit Trunk Mount, ETS 5" Intercooler, M6 Rims, ER Charge Pipe, Fordged DV's, MMp relocated inlets, Ebay 4" chrome Tips, Lux Angel Eyes ********11.910 @ 117.091.851 60'*********
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05-12-2012, 11:37 PM	#24
pavo335 Banned 74 Rep 2,934 Posts Drives: 3.5 wheeler Join Date: Feb 2012 Location: sydney iTrader: (0)	1 ensure you run the USB exe file on the laptop and 2. I must be really dumb cause I have installed the software on 3 laptops and I still forget to turn the ignition ON when connecting. After a bit of head scratching I remember and all good.
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05-13-2012, 11:52 AM	#25
FoShizzle aka Mike 108 Rep 1,395 Posts Drives: AW E92 335is Join Date: Jun 2008 Location: LA/Ventura, CA iTrader: (11)	I had this happen to me yesterday after update to the newest interface. I set my interface to the correct com (7) and it kept saying failure. I was about to take off the cowling and check my USB connection, but after I restarted my laptop it worked fine.
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02-17-2013, 10:21 AM	#26
GTstunna612 Lieutenant 52 Rep 512 Posts Drives: BMW Join Date: Feb 2008 Location: Tampa, FL iTrader: (0) Garage List E90 335i [0.00]	u have to adjust your COM settings, make sure you hook up the usb cable first before opening the JB4 interface __________________ E90 335i Alpine White E90 328i Titanium Silver
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10-24-2018, 12:13 PM	#27
Cfitz New Member 5 Rep 14 Posts Drives: 2012 335is Join Date: Mar 2017 Location: SFL iTrader: (0)	Experienced a connection issue on Windows 7 via Parallels on macOS. After plugging the JB4 into my computer with the car completely off, Windows installed the drivers for it. To fix this, I went into the "Devices and Printers" tab in Windows, right clicked the JB4 device (called "TTL232R" in my case), clicked Properties, clicked the "Change Settings" button, went to the "Port Settings" tab in the new window, clicked the "Advanced" button, selected "COM 1" for "COM Port Number" option, then saved everything. Everything worked fine for me following this and I was able to update my JB4's firmware per usual instructions.
	Appreciate 0 Quote