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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
#71
GS-911 / Re: Why was the minimum voltag...
Last post by JCtx - April 12, 2026, 07:31:26 AMI took a different approach: I spent $180 on a LiFePO4 battery (and specialized charger), in part to solve the GS-911 issue, especially if I need to use it on the road. But my point was why increase the minimum voltage required to begin with, when it wasn't a problem before. Seems stupid having to either buy a new lithium battery, new charger, or both, for something that was never a problem. Seems crazy, so just want to know why it was done, if not too much to ask.
Anyway, I already asked that question via the link provided above, since that guy didn't want me to post here, so I won't come back. If they lower the voltage again, great. If not, then it is what it is. Take care.
Anyway, I already asked that question via the link provided above, since that guy didn't want me to post here, so I won't come back. If they lower the voltage again, great. If not, then it is what it is. Take care.
#72
GS-911 / Re: Why was the minimum voltag...
Last post by Borgia - April 12, 2026, 06:24:18 AMMaintaining a minimum voltage when performing diagnostics must be a fairly common thing as there are battery chargers having a specific "power supply" mode just for that purpose. My Optimate 7 has this mode.
#73
GS-911 / Re: Why was the minimum voltag...
Last post by JCtx - April 12, 2026, 04:59:54 AMWhat explanations??? I haven't seen any. On my other thread, I asked about issues with a lithium battery, and just mentioned a reason to buy it is because I couldn't use the GS-911 anymore with it. But I'm asking here why the voltage was increased, since nobody has ever reported a voltage issue on the BMW forums I follow.
But guess will ask at that link, and see what happens. But if there are any explanations here, I'd love to read them.
But guess will ask at that link, and see what happens. But if there are any explanations here, I'd love to read them.
#74
GS-911 / Re: Why was the minimum voltag...
Last post by WayneC - April 12, 2026, 03:21:18 AMQuote from: JCtx on April 11, 2026, 05:00:04 AM
Just saw a video of a transmission calibration with a GS-911 where the threshold was 12.0V (software version 2502.3). Just like me, the guy had his battery fully charged, and after also hooking up a charger, his voltage dropped to 12.4V almost immediately as well. The difference is he could do everything. With 12.5V, it aborts everything. So why did you guys increase it, and by that much??? Never had an issue with the GS-911 for about 3 years with the lower voltage. Don't even remember what it was the minimum, but it was never triggered. Now I can't do squat with an AGM battery, PLUS a charger.
Hopefully it can be reverted back to 12.0V. Or at least 12.3V, which should be fine with a charger connected. Please let us know. Thank you.
It would be best to lodge a support ticket with Hexcode https://www.hexgs911.com/contact-us/ as the explanations of the reasons for maintaining voltage have not satisfied you & continuing to post on the forum will not ewsolve anything
#75
GS-911 / Why was the minimum voltage in...
Last post by JCtx - April 11, 2026, 05:00:04 AMJust saw a video of a transmission calibration with a GS-911 where the threshold was 12.0V (software version 2502.3). Just like me, the guy had his battery fully charged, and after also hooking up a charger, his voltage dropped to 12.4V almost immediately as well. The difference is he could do everything. With 12.5V, it aborts everything. So why did you guys increase it, and by that much??? Never had an issue with the GS-911 for about 3 years with the lower voltage. Don't even remember what it was the minimum, but it was never triggered. Now I can't do squat with an AGM battery, PLUS a charger.
Hopefully it can be reverted back to 12.0V. Or at least 12.3V, which should be fine with a charger connected. Please let us know. Thank you.
Hopefully it can be reverted back to 12.0V. Or at least 12.3V, which should be fine with a charger connected. Please let us know. Thank you.
#76
GS-911 Wifi / Re: "Ignition is not ON" error...
Last post by botus - April 10, 2026, 09:57:43 AMdoes the bike start ride and have all functions (lights indicators, cluster etc.) ?
something is very strange if above works but the tool can't show the ignition switch status - what condition is the bike? - is it std, low miles and good condition ?
if its playing up on the bike and the tool - two wear items might not be helping - ignition switches can wear - not the key, the switch beneath, and these days a main module the ZFE are starting to fail due to ageing - but these would likely present as real vehicle faults
ZFE's on cars these days are often referred too as body control modules - and really control lots of axillary functions like lights and systems (rather than brakes, transmission or engine control)
something is very strange if above works but the tool can't show the ignition switch status - what condition is the bike? - is it std, low miles and good condition ?
if its playing up on the bike and the tool - two wear items might not be helping - ignition switches can wear - not the key, the switch beneath, and these days a main module the ZFE are starting to fail due to ageing - but these would likely present as real vehicle faults
ZFE's on cars these days are often referred too as body control modules - and really control lots of axillary functions like lights and systems (rather than brakes, transmission or engine control)
#77
GS-911 / Re: Any remedy if getting 'ove...
Last post by WayneC - April 10, 2026, 03:52:33 AMQuote from: JCtx on April 10, 2026, 02:40:37 AM
I figured you cannot change the voltages, and neither on a car. But changing the battery type takes care of any voltage differences, along with setting the proper Ah rating. But our bikes apparently have none of that. Or at least the GS-911 does not have that capability.
I remember somebody saying a dealer can actually change the battery to lithium, since it's optional on some bikes. But again, the GS-911 apparently can't do that.
At any rate, those lithium batteries supposedly have an internal BMS that is supposed to compensate for any differences with an AGM battery, so guess we'll see with this NOCO unit.
The GS911 can only perform the functions set by BMW in the ECU firmware, sometimes it takes a little time for GS911 to include all functionality in the ECU's
Changing battery model/AH/Type is only possible if BMW include that ability in the ecu's & firmware/iLevel updates by BMW may add battery types/models hence it can be good to keep iLevel up to date, it can also be useful to specify iLevel in forum posts as it then enables those who know the latest iLevels on a bike to let owners know there are updates available, unfortunately BMW dont provide a lot of info on what is in iLevel updates
The dealer ability to change battery type to Lithium will only apply to the models BMW have programmed into the ECU's the ability to do so
Re Lithium battery BMS, not all Lithium batteries have an internal BMS & the internal BMS is not there to compensate for differences with an AGM or other Lead Acid battery types, it is there to monitor charge of the individual cells & in some adjust the charge rate into individual cells
#78
GS-911 / Re: Any remedy if getting 'ove...
Last post by JCtx - April 10, 2026, 02:40:37 AMI figured you cannot change the voltages, and neither on a car. But changing the battery type takes care of any voltage differences, along with setting the proper Ah rating. But our bikes apparently have none of that. Or at least the GS-911 does not have that capability.
I remember somebody saying a dealer can actually change the battery to lithium, since it's optional on some bikes. But again, the GS-911 apparently can't do that.
At any rate, those lithium batteries supposedly have an internal BMS that is supposed to compensate for any differences with an AGM battery, so guess we'll see with this NOCO unit.
I remember somebody saying a dealer can actually change the battery to lithium, since it's optional on some bikes. But again, the GS-911 apparently can't do that.
At any rate, those lithium batteries supposedly have an internal BMS that is supposed to compensate for any differences with an AGM battery, so guess we'll see with this NOCO unit.
#79
GS-911 / Re: Any remedy if getting 'ove...
Last post by WayneC - April 10, 2026, 02:26:01 AMThe voltage requirement for coding/programming/resets is set in the ECU firmware not the GS911, it can even be set within individual job scripts in the BMW Dealer Diagnostics system, with the cars 14v is the minimum voltage required, the Motorrad division was a little slack in specifying minimum voltage & the last time I looked it was specified to be 13.5v. On the Husky Terra 650's released over 10 years ago you cant even do a service spanner reset without 14v
Regardless of model when doing any diagnosis I use power supplies/chargers which maintain 14v
The battery registration capability only applies to later more modern models & is to optimise charging curves & is also used to turn off/minimise charging when heavy on the use of throttle which improves throttle response
Regardless of model when doing any diagnosis I use power supplies/chargers which maintain 14v
The battery registration capability only applies to later more modern models & is to optimise charging curves & is also used to turn off/minimise charging when heavy on the use of throttle which improves throttle response
#80
GS-911 Wifi / Re: "Ignition is not ON" error...
Last post by 03-K1200GT - April 10, 2026, 02:03:12 AMThanks for the info.
I've installed the new firmware and the Diagnostic for Windows, v2603.5 and Android.
I've connected a battery charger and the voltage stays in the high 12 volts.
Whether I start the Diagnostic with the ignition on or turn it on after the error message I still see the same behaviour.
In the former case I have never managed to see the 'Ignition ON' icon in the notification bar go green and the key indicator move to the vertical position. In the latter case the key icon goes vertical and the circle turns green for 1 or 2 seconds then the Ignition not on error appears.
I see this behaviour on both Windows and Android apps.
As I mentioned in an earlier post, 2 yrs ago, using the Android Diagnostic I had gotten deep into the functions. Now, I cannot even connect to these features.
see:
K1200GT Halls Sensor
« on: August 05, 2024, 09:10:27 PM »
I've installed the new firmware and the Diagnostic for Windows, v2603.5 and Android.
I've connected a battery charger and the voltage stays in the high 12 volts.
Whether I start the Diagnostic with the ignition on or turn it on after the error message I still see the same behaviour.
In the former case I have never managed to see the 'Ignition ON' icon in the notification bar go green and the key indicator move to the vertical position. In the latter case the key icon goes vertical and the circle turns green for 1 or 2 seconds then the Ignition not on error appears.
I see this behaviour on both Windows and Android apps.
As I mentioned in an earlier post, 2 yrs ago, using the Android Diagnostic I had gotten deep into the functions. Now, I cannot even connect to these features.
see:
K1200GT Halls Sensor
« on: August 05, 2024, 09:10:27 PM »