Discussion:
changing battery voltages in Toyota 7FBCU15

i got a few trucks currently that are using 36v batteries. I would like to be able to change them over to a 48v battery. I know that you can change it using the Service FUNCTION --> OPTION SET menu, but is there anything I would need to know before attempting this? Are all the components inside the truck able to handle this multi voltage?

please help ! thanks
  • Posted 18 Oct 2011 03:27
  • By digitalpnk
  • joined 2 Sep'11 - 24 messages
  • Ontario, Canada
Showing items 1 - 7 of 7 results.
By the way, I did not change the lights or horn either, and they all work fine!! so far.....
  • Posted 1 Sep 2012 07:18
  • By sassypants
  • joined 1 Sep'12 - 3 messages
  • Ohio, United States
Had the same issue on a 7FBCHU25 truck, I went back to change voltage back to 48v from 36v with no luck. Confused as to why I could change from 48 to 36, but not back to 48 from 36; I went back to the programming section again and again. Finally I found that if I exited the programming at function #6; which happens to be "END" all works just fine. Previously I think I may have just turned off the key or something? to reset out of programming or service functions. Good luck!!
  • Posted 1 Sep 2012 07:17
  • By sassypants
  • joined 1 Sep'12 - 3 messages
  • Ohio, United States
ok i have tried this with a second forklift and same story, get the error code e2-2.

I would like to add that both times the horn and lights weren't changed to 48v before the voltage change over.

anyone got suggestions ?
  • Posted 29 Oct 2011 05:18
  • Modified 29 Oct 2011 07:03 by poster
  • By digitalpnk
  • joined 2 Sep'11 - 24 messages
  • Ontario, Canada
Need to check all options are correct or specific to units options per lift. Have seen this once before related to incorrect option set.
  • Posted 19 Oct 2011 12:25
  • By Huckleberry
  • joined 20 Jul'11 - 29 messages
  • Tennessee, United States
I ran the analyzer and it points me to either a harness defect or a thermo-sensor defect


how can I further check which is at fault ?
  • Posted 19 Oct 2011 01:43
  • By digitalpnk
  • joined 2 Sep'11 - 24 messages
  • Ontario, Canada
after trying it out with one of the forklifts, i got an error e2-2 motor thermo-sensor abnormality. does that have anything to do with it?
  • Posted 18 Oct 2011 22:54
  • By digitalpnk
  • joined 2 Sep'11 - 24 messages
  • Ontario, Canada
You need to change your lights and horn.
  • Posted 18 Oct 2011 22:41
  • By Prentice
  • joined 25 Jun'08 - 600 messages
  • Ontario, Canada

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Global Industry News
edition #1255 - 6 November 2025
In this week’s Forkliftaction News , Hyster-Yale says it is reducing production because of “softer demand” as it reports revenue for Q3 was USD979 million, a drop both year-on-year and quarter-on-quarter... Continue reading
Fact of the week
In Germany, the 9th of November is sometimes called Schicksalstag, the "Day of Fate" because it has been the day for several major historical events, including the horrors of Kristallnacht in 1938 and the fall of the Berlin Wall in 1989.