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Old 04-02-2015, 07:05 AM   #1
racercdd
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Default EZGO Running Slow with new batteries

Need a little help. I have a 05 ezgo pds that I just put new Trojan batteries in. Battery's read 38.3 volts when fully charged.

The cart moves really slow going forward, if I put it in reverse and then go forward again it will run fast again, until I stop, then it creeps again. It doesn't "fix itself" everytime I put it in reverse, just about every other time.

Whats wrong with this thing? lol
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Old 04-02-2015, 08:28 AM   #2
JohnnieB
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Default Re: EZGO Running Slow with new batteries

Put controller in diagnostic mode and listen for error codes.

Text at bottom of attach label tells you how to put into diagnostic mode.
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File Type: jpg PDS Label on Controller Cover.JPG (142.9 KB, 0 views)
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Old 04-02-2015, 08:34 AM   #3
scottyb
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Default Re: EZGO Running Slow with new batteries

Generally speaking it could be the solenoid is welded shut or the speed magnet has failed.
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Old 04-02-2015, 10:20 AM   #4
racercdd
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Default Re: EZGO Running Slow with new batteries

I put it in diagnostic mode yesterday, I got the one beep and then nothing else. When I tried to drive it again then it started beeping. Is that how its suppose to work? I waited about 5 minutes and it never beeped so I tried to drive it then it started to beep. It was 3 then 2 beeps.
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Old 04-02-2015, 10:23 AM   #5
rib33024
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Default Re: EZGO Running Slow with new batteries

Welcome to BGW

3 - 2 is a fault code for solenoid welded
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Old 04-02-2015, 10:27 AM   #6
racercdd
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Default Re: EZGO Running Slow with new batteries

So the solenoid may be bad, would that be the case if it runs up to speed if I backup first?
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Old 04-02-2015, 10:36 AM   #7
scottyb
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Default Re: EZGO Running Slow with new batteries

The control is sensing the solenoid welded closed. It is going into limp mode for safety. Replace solenoid with a HD 200a model. Check out our sale.
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Old 04-02-2015, 12:30 PM   #8
JohnnieB
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Default Re: EZGO Running Slow with new batteries

!!!!!! Be sure to place Run/Tow switch to Tow before Disconnecting or reconnecting anything electrical !!!!!!

Disconnect J1, spray the contacts in both Plug & Jack with contact cleaner and repeatedly insert Plug back into Jack while contacts are still damp.

Repeat for J3 and J4.

If that doesn't do the trick, jack rear wheels off ground and put rear of half ton cart on jack-stands so it doesn't run over somebody or something while troubleshooting.

Using a DVM (Digital Volt Meter), measure and record battery pack voltage at least to the nearest 1/10 volt. (IE: Fully charged 36V battery pack will be 38.2V or slightly above.)

Leave DVM negative test lead attached to battery pack's main negative terminal.

With Run/Tow = Run, Keyswitch = ON, F/R = F and Pedal depressed until solenoid clicks, measure voltage at: (While Plugs are inserted into Jacks)
J1 Pins 1, 3, 4, 5, 6, 8 & 9
J3 Pins 1, 2, 3 & 4
J4 Pins 1 & 2

Every one of the 13 test points listed should have FULL battery pack voltage.

If any are less than full battery pack voltage, fix the switch and/or wires attached to that switch. (Pin numbers and switches shown on attached schematic)

If the voltage is good at all those test points, and you are still getting reduced performance and the 3-2 beep code, the controller is probably bad.

------------
FWIW: The 3-2 error code is generated when the voltage on the controller's B+ terminal does not fall below the voltage at J1 Pin-5 when the solenoid's coil is not being energized by the controller.

Three things can cause that set of circumstances:
1. The voltage at J1 Pin-5 is less than FULL pack voltage. (Note: "Check auxiliary power", is the first "Correction Required" action listed for a 3-2 beep code)
2. Solenoid contacts welded closed. (Replacing solenoid is the second corrective action listed on PDS label)
3. Voltage comparator in controller is bad. (If any part of controller is bad, the whole thing has to be replaced.)
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File Type: jpg Wiring Diagram - PDS.JPG (129.4 KB, 0 views)
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Old 04-02-2015, 12:47 PM   #9
racercdd
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Default Re: EZGO Running Slow with new batteries

Thanks guys, I've ordered the solenoid and i'll try to clean the contacts while i'm waiting on it to get here.
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Old 03-05-2021, 08:00 PM   #10
bowersneef
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Default Re: EZGO Running Slow with new batteries

Mine is doing the same thing. Did the solinoid fix it?
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