Quick update... I bought a new antenna ring and plugged it in using spare key ... still ews.. tried a new battery... still ews..when it began I was trying to start the bike .. it turned over for a second or so then ews ... it seems unlikely to be a broken wire cos I can move the handle bars fully side to side.. and I’ve jiggled the loom and has made no difference... I’m just wondering if you have to reset the ews code somehow ...
You cannot reset an EWS fault by plugging in a box and pressing a button.
EWS is displayed, because the ring antenna has
A) Failed / broken
B) Not getting power
c) A fault with the key. or it cannot read the key
However the key is passive - ie it has no power it works by the ring antenna generating an inductive loop which excites the chip in the key which then sends its code to the ring antenna
Your comment " it seems unlikely to be a broken wire cos I can move the handle bars fully side to side."
?? Say what ...
I will go over it again
Put the key in the ignition and turn and hold the bars all the way to the left turn the key on - do you get EWS on the display yes - no - Yes EWS = - bike will not start
Put the key in the ignition and turn and hold the bars straight ahead turn the key on - do you get EWS on the display yes - no - Yes EWS =- bike will not start
Put the key in the ignition and turn and hold the bars all the way to the right turn the key on - do you get EWS on the display yes - no - Yes EWS =- bike will not start
If the bike does not show EWS in one of the above positions left mid right, then chances are its a broken wire. by moving the bars you move the wires and make the broken ends touch and the EWS
symbol will not be displayed
If as you say it dosent work in any position and with a new unit is a 99.5% certainty that you have a broken wire ( the other 0.5%) is a power pin backed out of the plug
Hate to say it, but you need to strip the tank and front end to get to the loom. work from the power plug back stripping the wrapping back as you go
It will more than likely be in the area of a cable tie (pulled too tight ) if you look at the post i attached. you can see where the wire broke. mid way in a run in the middle of the bundle ?