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GS-911, diagnostics for the people (r)
News:
January 2025 GS-911 software and firmware available! Details at https://www.hexgs911.com/news/january-2025-software-and-firmware-updates/
Recent posts
#1
ezCAN / ezCAN Mojave Fuse Settings
Last post by key - July 17, 2026, 11:20:10 PMHello all. I'm running an ezCAN Mojave as a means to power an auxiliary brake/taillight on a 2025 BMW R12 nineT. Taillight is connected to the ezCAN yellow circuit; all other circuits are unused and have been disabled.
The default fuse setting for the yellow circuit was originally 5A, and at that setting everything worked as expected. There was, and still is, a 1 or 2 second delay between the illumination of the OEM lights and the auxiliary taillight when I power up the bike, but I assume that's normal behavior for the ezCAN. Please advise if not.
Back to the fuse settings: ezCAN's diagnostic function shows that the taillight uses a peak amperage of about 0.5A, so based on that I decided to reduce the default fuse setting from 5A to 4A. After doing so the taillight no longer powers up unless I power-cycle the bike, at which point the tail/brake light works on the second attempt. Seems that powering the bike on/off resets something within the ezCAN which then allows it to function normally. Not sure what that might be other than the fuse protection setting. If I change 4A back to 5A, the problem goes away.
This might be analogous to when I complain to the doctor about how it hurts when I poke myself in the eye and he tells me the cure is to just stop doing that. It's not really a problem to have to use the 5A fuse setting, but why does a low-amperage device like an LED taillight need such a high setting to operate correctly? The taillight wiring harness uses conductors that are as fine as frog hair, so I'd prefer to not set the fuse any higher than necessary. Anybody encountered anything like this before?
The default fuse setting for the yellow circuit was originally 5A, and at that setting everything worked as expected. There was, and still is, a 1 or 2 second delay between the illumination of the OEM lights and the auxiliary taillight when I power up the bike, but I assume that's normal behavior for the ezCAN. Please advise if not.
Back to the fuse settings: ezCAN's diagnostic function shows that the taillight uses a peak amperage of about 0.5A, so based on that I decided to reduce the default fuse setting from 5A to 4A. After doing so the taillight no longer powers up unless I power-cycle the bike, at which point the tail/brake light works on the second attempt. Seems that powering the bike on/off resets something within the ezCAN which then allows it to function normally. Not sure what that might be other than the fuse protection setting. If I change 4A back to 5A, the problem goes away.
This might be analogous to when I complain to the doctor about how it hurts when I poke myself in the eye and he tells me the cure is to just stop doing that. It's not really a problem to have to use the 5A fuse setting, but why does a low-amperage device like an LED taillight need such a high setting to operate correctly? The taillight wiring harness uses conductors that are as fine as frog hair, so I'd prefer to not set the fuse any higher than necessary. Anybody encountered anything like this before?
#2
GS-911 Wifi / Re: Functionality explanations
Last post by gixxerchuck - July 17, 2026, 10:58:59 AMQuote from: WayneC on July 16, 2026, 02:34:38 AMWelcome to the forumAh, ok. Thanks didn't know that. It's for an S1000RR.
Menu items are specific to each model so a list is not really feasible
I notice you did not state your bike model so it would be impossible for anyone to assist you
Do hex provide a manual as did not get one and cannot see anything on their site. Also took me 4 months to get approved on the forum 😂
#3
Central Vehicle Electronics/ZFE/GM issues / Re: Configuration to float lev...
Last post by botus - July 17, 2026, 10:58:10 AMQuote from: Guilherme on July 08, 2026, 08:33:20 PMHi Botus,
If there is an option to choose the tank level sensor type—either capacitive (strip type) or resistive (float type), this choice should be independent of the specific ZFE module installed on the motorcycle.
thats how the other tool offers things - the way I understand it - the GS911 works out there is no point allowing you to check a box to make that change - if the rest of the bike / other elements of the coding will not allow it to function - so it just informs the user the bike isn't suitable for the swap
Actually - that's exactly how it is with the ZFE Basic High in my 2008 R1200GS - older iterations of the Red GS911 software used to allow me to swap that configuration - but it never functioned, now it flags isn't not suitable with a message
@Guilherme - are you fully aware only ZFE High units allow you to successfully do the swap to a Float - and that its way less accurate and either or sensor is still they way they build them - the best way to fix the strip sensor bikes is to use https://www.fuelsensortech.com/en
#4
General Discussion / New Look, Same Out-of-Date New...
Last post by karlh - July 16, 2026, 10:04:25 PMWith the website's new look I thought the news item link in the upper right corner would be updated, but no such luck. Your link to a January 2025 firmware update is 18 month old. At least three updates have become available since that item was posted. I even discussed this with one of your representatives at this year's BMW MOA rally in Vermont, but apparently it fell on deaf ears.
#5
GS-911 Wifi / Re: Functionality explanations
Last post by WayneC - July 16, 2026, 02:34:38 AMWelcome to the forum
Menu items are specific to each model so a list is not really feasible
I notice you did not state your bike model so it would be impossible for anyone to assist you
Menu items are specific to each model so a list is not really feasible
I notice you did not state your bike model so it would be impossible for anyone to assist you
#6
GS-911 Wifi / Functionality explanations
Last post by gixxerchuck - July 16, 2026, 12:17:30 AMHas anyone documented the full list of the menu items and what the commands do.
Saw a bit for enabling sports dash but would be useful if someone had mapped the options with a description of what they all did
Saw a bit for enabling sports dash but would be useful if someone had mapped the options with a description of what they all did
#7
Central Vehicle Electronics/ZFE/GM issues / Re: Configuration to float lev...
Last post by Guilherme - July 08, 2026, 08:33:20 PMHi Botus,
If there is an option to choose the tank level sensor type—either capacitive (strip type) or resistive (float type), this choice should be independent of the specific ZFE module installed on the motorcycle.
The strip type sensor was used for only a short period; due to the fragility of the 400 individual circuits it contained, BMW reverted to the old and knowed float type system.
The ZFE unit supports and recognizes both systems. Physically, the input connection at the ZFE must be modified: the pins located at positions 34 and 35 (for the strip type) must be reconnected to positions 21 and 37 (for the float type). And we must change de configuration on the software.
Since the ZFE internally supports both systems, the GS911 should be able to read all the configurations available within the ZFE processor.
If there is an option to choose the tank level sensor type—either capacitive (strip type) or resistive (float type), this choice should be independent of the specific ZFE module installed on the motorcycle.
The strip type sensor was used for only a short period; due to the fragility of the 400 individual circuits it contained, BMW reverted to the old and knowed float type system.
The ZFE unit supports and recognizes both systems. Physically, the input connection at the ZFE must be modified: the pins located at positions 34 and 35 (for the strip type) must be reconnected to positions 21 and 37 (for the float type). And we must change de configuration on the software.
Since the ZFE internally supports both systems, the GS911 should be able to read all the configurations available within the ZFE processor.
#8
GS-911 / Re: Power save
Last post by GS Jim - July 08, 2026, 06:17:09 PMThis is a good idea, I have the cruising lights enabled and it causes all the lights (low beam, indicators/cruising) to go on when you key on instead of the low to stay off when till engine start like it used to. I disable the cruise light function when doing extended work but that is a pain to do every time. I will also unplug the headlight and then clear any faults after to decrease battery drain. Of course you pretty much have to run a decent charger anyway.
#9
GS-911 Wifi / Re: XRDS TPM
Last post by GS Jim - July 08, 2026, 06:07:00 PMI have done this on my 2018 R1200 GS, I found it in RDC/Service Functions/Online Service Functions/Coding Functions/Configurations. I ended up restoring the original OEM settings as it kept throwing up weird warnings even though I was within the custom settings I made.
#10
GS-911 Wifi / Re: XRDS TPM
Last post by botus - July 08, 2026, 04:01:06 PMI don't believe so, never came across the feature to play at that level...
start with the user manual for the bike ?
I have heard people claim BMW dealers have reset/recalibrated things - But I don't think that's a reality - not saying its impossible sometimes dealer kit has more features than third party tools and equally sometimes third party stuff can enable features dealer kit can't (see tyre temps and heated grip symbols in the cluster on older models)
on my car and most car systems its quite normal to have a user preference reference value - and its clear in the cluster that's there and the exact how, always explained in the user manual - its usual for things like snow tyres where you might want a very different pressure warning to summer tyres - where otherwise the nag of low level warning is just an irritant
never come across it, and indeed never had a warning on 5 BM bikes and 15 years of using BMW TPMS - until end last year when the 2011 GS irritated me with it when it was reasonably low - I could feel it way before the system woke up - hadn't ridden the bike for >3 months and the front was down to 1.7 bar and went off when I raised it to 1.8 bar till then never knew it could nag me
my 2007 GS only gave pressure reading and tyre temps - only other time I saw a warning was when it was flat from a puncture - I'd pumped it up, and it threw the nag during rapid deflation to fix it - which is when I thought they were supposed to overtly nag you
start with the user manual for the bike ?
I have heard people claim BMW dealers have reset/recalibrated things - But I don't think that's a reality - not saying its impossible sometimes dealer kit has more features than third party tools and equally sometimes third party stuff can enable features dealer kit can't (see tyre temps and heated grip symbols in the cluster on older models)
on my car and most car systems its quite normal to have a user preference reference value - and its clear in the cluster that's there and the exact how, always explained in the user manual - its usual for things like snow tyres where you might want a very different pressure warning to summer tyres - where otherwise the nag of low level warning is just an irritant
never come across it, and indeed never had a warning on 5 BM bikes and 15 years of using BMW TPMS - until end last year when the 2011 GS irritated me with it when it was reasonably low - I could feel it way before the system woke up - hadn't ridden the bike for >3 months and the front was down to 1.7 bar and went off when I raised it to 1.8 bar till then never knew it could nag me
my 2007 GS only gave pressure reading and tyre temps - only other time I saw a warning was when it was flat from a puncture - I'd pumped it up, and it threw the nag during rapid deflation to fix it - which is when I thought they were supposed to overtly nag you