TXT 48 Speed Controller question

[kgsc]

I would highly doubt that the profile information changed because of low battery voltage or the like. Those parameters are stored on a chip in the controller that doesn’t have a battery backup. Are the brakes dragging?

[droppingdeuces79]

Originally Posted by kgsc

I would highly doubt that the profile information changed because of low battery voltage or the like. Those parameters are stored on a chip in the controller that doesn’t have a battery backup. Are the brakes dragging?

It's not the breaks, I can hear and feel the motor slowing it down as compared to how it previously ran. It wants to take off fast but quickly levels out at 10mph.

I'm not sure what else it can be, I'd swapped the speed sensor and throttle sensor.

[kernal]

If that controller somehow reverted to a more restricted mode on its own without someone commanding it with a scan tool,or possibly a repair, it will be the first time that has ever been reported on this forum in the last 10 plus years I've been active here. Not just EZGO either. Club Car and Yamaha also. ( assumes my memory is still functional--iffy)

[droppingdeuces79]

Originally Posted by kernal

If that controller somehow reverted to a more restricted mode on its own without someone commanding it with a scan tool,or possibly a repair, it will be the first time that has ever been reported on this forum in the last 10 plus years I've been active here. Not just EZGO either. Club Car and Yamaha also. ( assumes my memory is still functional--iffy)

Any other suggestions as to what would make the cart operate at half the previous speed?

[kgsc]

Have you tried pushing it to see if the rollaway braking works? Also where are you located?

[droppingdeuces79]

Originally Posted by kgsc

Have you tried pushing it to see if the rollaway braking works? Also where are you located?

Does the cart have to be in forward or reverse to test this? I think you're mentioning the beeping? It doesn't beep when I push it, though it is resisting as compared to being in tow mode. This was a problem I had before and swapped the speed sensor which resolved. I bought another one and didn't correct it. Not sure if it can be the magnet in the motor.

I'm in South East Florida.

[scottyb]

So one time a speed sensor resolved the problem but, this time it does not? Check the speed sensor wiring?

[droppingdeuces79]

Originally Posted by scottyb

So one time a speed sensor resolved the problem but, this time it does not? Check the speed sensor wiring?

I wouldn't say problem was identical. When I first replaced speed sensor the cart speed was more erratic. It would start fast and dramatically slow down. In this case the speed seems consistent. It will accelerate to the 10mph quickly but stay there. Basically pushing accelerator halfway is same as full press.

It seems weird that something shorted the solenoid and then the speed is suddenly cut in half. The wiring seems fine, no obvious issues through visual inspection.

[jneubig]

Have you done any testing on batteries? Load tests? Individual voltage? Running them dry on two occasions is definitely not good for them. What's the date code on them. Might be the source of all your issues.

[droppingdeuces79]

Each battery reads 8 volts and 50/52 when using first and last in series to test. I drove down road with multimeter connected and was showing 48 as I drive pedal down.