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Electric Yamaha Electric Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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04-30-2020, 09:34 PM | #1 |
Not Yet Wild
Join Date: Mar 2019
Location: Top End of Australia
Posts: 41
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Yamaha Drive Issue with Controller
Hi everyone,
I have a Yamaha G29 that has a derating/surging issue, batteries are at 75% capacity, all the terminals are good, but it has error's codes #27 MCU internal error, plus code #99 Undescribed error, it just repeats. Notice there isn't much around on the Yammy fault codes full stop, any advise would be appreciated, cheers pete |
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05-01-2020, 11:33 AM | #2 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Yamaha Drive Issue with Controller
Please elaborate on the "batteries are at 75%" thing.
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05-01-2020, 07:36 PM | #3 |
Not Yet Wild
Join Date: Mar 2019
Location: Top End of Australia
Posts: 41
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Re: Yamaha Drive Issue with Controller
I mean I did a discharge test on the battery pack, got about 70 minute on the 4 x T1275's
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05-01-2020, 08:15 PM | #4 |
Not Yet Wild
Join Date: Mar 2019
Location: Top End of Australia
Posts: 41
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Re: Yamaha Drive Issue with Controller
Actually took it for a drive this morning, it takes off like a rocket, then goes ok, then it intermittently stutters with pedal down, then away again, then sometimes after bringing cart to a stop, locks up & doesn't move, you can hear the solenoid working, turn the key on & off a couple of times then your off again. I checked foot switch test fine, but comes up with the MCU & unidentified faults, I will collect next week & put on the hoist, will swap throttle pot over to prove is my last idea for now
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05-02-2020, 03:12 AM | #5 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Yamaha Drive Issue with Controller
Unfortunately, there are many "undescribed errors" even us yamaha dealers arent privy to. They are usually internal faults inside the controller, but not always.
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05-02-2020, 05:52 AM | #6 |
Not Yet Wild
Join Date: Mar 2019
Location: Top End of Australia
Posts: 41
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Re: Yamaha Drive Issue with Controller
Thanks cgtech,
I might as well put it up in the air, check motor brushes & throttle pot, for the next stage, that will cross most of the boxes off, cheers pete |
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