Hi All, I have replaced the original controller & display on my Volt Pulse with a new KT T06S controller and a LCD8SU display. All all is working ok except the pedal assist doesn't work at all. I'm attempting to reuse the existing pedal assist sensor - it has the little red led light on the sensor and when I put a meter on it there is 4.2v across the red & black cables and a constant 2.1v on the white cable. However this voltage doesn't change when the pedals are turned. Should this voltage fluctuate when pedals turned? This sensor was working perfectly before the controller change. Or could it be I need to change a setting in the controller? The motor works fine on the thumb throttle. Also should there be an indicator on the display to show it's detected the pedals are turning? Many Thanks for any help in advance!

Hi All, I have replaced the original controller & display on my Volt Pulse with a new KT T06S controller and a LCD8SU display. All all is working ok except the pedal assist doesn't work at all. I'm attempting to reuse the existing pedal assist sensor - it has the little red led light on the sensor and when I put a meter on it there is 4.2v across the red & black cables and a constant 2.1v on the white cable. However this voltage doesn't change when the pedals are turned. Should this voltage fluctuate when pedals turned? This sensor was working perfectly before the controller change. Or could it be I need to change a setting in the controller? The motor works fine on the thumb throttle. Also should there be an indicator on the display to show it's detected the pedals are turning? Many Thanks for any help in advance!

The voltage should pulse 5v between ground and the signal wire. If you have an automatic meter, make sure it's not measuring AC.

 

The KT controllers need to be set to match the pattern of pulses from the pedal sensor using parameter C1. Some 12 magnet sensors can't be matched.

 

Another common problem is the wiring sequence in the connector. If you have the sealed round type, there's usually a mismatch with the sequence/positions between the KT and non-KT pedal sensors, in which case you have to either cut a cable and adjust the sequence or get a matching pedal sensor. If you have the block unsealed connectors, you only have to look at the wires to see if the colours match, and swap pins if they don't.

out of the box a kt controller (mine at least) will not have pas control enabled.

 

You can probably download a full manual in chenglish that details the settings and config, the version i found for my lcd (10h) was not the clearest when it came to pas sensor settings, - I simply tried each of the 5x or 6x options in turn til one worked.. - no harm caused by the trial and error approach.

 

However someone wil probably know the best parameters to set for a uk rd legal set up and post them as it was too long ago for me to recall right now and im not venturing into the kt lcd pdf until i NEED to

d8veh has said it all in #2, critically with non KT parts is to check wire sequence. If the connector is moulded/sealed type you have to chop the PAS connector and leave a 15cm tail on it so one can check for 5v and signal.

Bare the three wire ends and keep them isolated from each other, connect to the controller PAS line. With a meter identify the 5V and Gnd then rejoin the chopped cable so sequence matches ( this likely means on PAS wiring side the colours won't match each other when reconnected), as long as pin sequence from controller matches the wiring from the PAS sensor then you have a chance of the PAS being compatible. The thrid wire will be signal.

Other option is simply buy a KT PAS which will be 100%.

Thanks everyone. I will double check/test the wiring and then have a play with the C1 settings as soon as I get chance. You really are a wonderful bunch here!