LCD S866 - not working - error E10?

laurent1784

Finding my (electric) wheels
Jan 5, 2025
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You should check the 5v. Comms protocols don't affect the LCD switching on the controller, since it has to do that before they can communicate.
I'll check the voltage but the display does turn on. What happens is that I get an error 10 code nor any speed readings. the original display wouldn't even turn on at all. It failed after 6 months of use. So the new one does turn on but receives no speed feedback and has the error code.
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
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I'll check the voltage but the display does turn on. What happens is that I get an error 10 code nor any speed readings. the original display wouldn't even turn on at all. It failed after 6 months of use. So the new one does turn on but receives no speed feedback and has the error code.
Check the 5v. Tests and measurements tell you what's wrong.
 

laurent1784

Finding my (electric) wheels
Jan 5, 2025
11
1
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Panama
Check the 5v. Tests and measurements tell you what's wrong.
Hi. I tested the voltage and got 4.83 V so I don't know what else could be the issue. Ordered a new display with the 5s protocol and got the same error e10 code
 
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saneagle

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Oct 10, 2010
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The bike should work with throttle and level 1 pedal assist without the display connected if you bridge the red and blue wires.
 

laurent1784

Finding my (electric) wheels
Jan 5, 2025
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Panama
The bike should work with throttle and level 1 pedal assist without the display connected if you bridge the red and blue wires.
I tried that but nothing happened so I am guessing it is an issue with the motor. They replaced a flat tire at a bike shop but I am not sure if they damaged the wiring.
 

saneagle

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Oct 10, 2010
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I tried that but nothing happened so I am guessing it is an issue with the motor. They replaced a flat tire at a bike shop but I am not sure if they damaged the wiring.
There should be a connector on the cable about 10 inches from the motor. make sure that it's pushed all the way in, then a bit more. There's a line that shows how far in it has to go.
 

laurent1784

Finding my (electric) wheels
Jan 5, 2025
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There should be a connector on the cable about 10 inches from the motor. make sure that it's pushed all the way in, then a bit more. There's a line that shows how far in it has to go.
I tried to push it in as hard I could go but does the line need to touch the female connector edge?61909
 
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Nealh

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Aug 7, 2014
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Yep two or three mm shy of the line .
 
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laurent1784

Finding my (electric) wheels
Jan 5, 2025
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I tried pushing it in hard but I only hear like a click, not sure if I need to press it even harder with some pliers because it will not go all the way till the marker reaches the edge
 

matthewslack

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Nov 26, 2021
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Pull it out and check all pins properly aligned and straight.
 
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Nealh

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Don't use tools on it , they are tight but one should only use hand strength to push them home.
 
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saneagle

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Oct 10, 2010
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I tried pushing it in hard but I only hear like a click, not sure if I need to press it even harder with some pliers because it will not go all the way till the marker reaches the edge
If you have any silicone grease, add a blob. It not only helps push in and pull out, but protects against water too.
 
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laurent1784

Finding my (electric) wheels
Jan 5, 2025
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Ok noticed something strange. So I changed to another controller i bought thinking it was a controller issue, shorted the red and blue wire for the display connector on it and got a red flashing light on the controller. It flashes 10 times and then off and cycles again 10 flashes. Connector went all the way in till the mark. My guess is something is wrong with the wiring inside the motor? I am thinking of ordering an ebike tester to see if it is a faulty hall sensor, or maybe the entire connector is loose or broken. Thanks for all the help.
 

Nealh

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A simple DVM is all that is needed to test for Hall failure , if you have moulded connectors then the task is more difficult.
 
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saneagle

Esteemed Pedelecer
Oct 10, 2010
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Ok noticed something strange. So I changed to another controller i bought thinking it was a controller issue, shorted the red and blue wire for the display connector on it and got a red flashing light on the controller. It flashes 10 times and then off and cycles again 10 flashes. Connector went all the way in till the mark. My guess is something is wrong with the wiring inside the motor? I am thinking of ordering an ebike tester to see if it is a faulty hall sensor, or maybe the entire connector is loose or broken. Thanks for all the help.
The flashing LED is normal. The flash sequence indicates the error code. 10 flashes probably means OK.
 
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laurent1784

Finding my (electric) wheels
Jan 5, 2025
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A simple DVM is all that is needed to test for Hall failure , if you have moulded connectors then the task is more difficult.
It has the 9 pin julet connector. I am trying to get an adapter to separate each pin individually so I can test them since they are too close to each other. I got a hold of a dealer on ebay that sells spare parts for this swagtron bike and he pointed out something interesting. There is no error code e10 on that bike. Supposedly if there is a problem with the motor, the display lights up an icon telling you there is an issue. If there were no comma, it would be another icon so I am guessing this display sent me is not compatible either with the controller. I'll see if I can order the 9 pin adapter and the tester to clear out any issues with the motor. Thanks for all the help provided.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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What connections are at the controller end as it is often easier to test them there.
 
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laurent1784

Finding my (electric) wheels
Jan 5, 2025
11
1
40
Panama
For the motor, the controller has a female 9 pin julet connector which makes it difficult for me to fully insert the multimeter probes since the space is really tight.
 

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