Hi Everyone, I have an ST3 which I have customised into a cafe racer style and when I was doing it, like so many others, I put the battery cables on the wrong terminals. This threw up the error code 19.2 starter solenoid short-circuit to ground and after some searching I found out that by connecting together the cables which go to the ECU terminal in plugs 1 (which goes to the solenoid) and 28 (which goes to the starter) this bypassed the problem and so I could start it although the headlight doesn’t dim on starting and the side stand cut out doesn’t work either. I have been using it like this and there haven't been any problem so far. I went to get the error codes cancelled by my local bike shop but unfortunately it doesn’t seem to be possible and as I am about to try and sell it it is a bit of a problem as the management light stays on. So, if anyone out there has any suggestions as to what I can do that would be a great help, thanks.
Could be as simple as the 20 amp fuse blown or as serious as an ECU fault. A common cause of 19.1 is a voltage spike to the ECU by using booster packs. Do not think clearing the fault code will be your solution without first finding the cause.
The normal result of connecting the battery the wrong way round is to blow the big 40A fuse that sits close to the starter solenoid. It's there to protect the regulator in case of such an occurrence. Then of course after refitting the battery the wrong way round there is no charge until the fuse is replaced. I can't see this causing your problem. However, there is diode fitted across the starter solenoid connection with its anode connected to the red/black wire which was switched 12V on it. It's there to suppress any back EMF spikes from the solenoid as it is disengaged, preventing damage to the bike's electronics. When the battery is connected the wrong way round under some circumstances this can blow. I don't think this on its own would cause a 19.2 error but it would be worth checking as it is possible that a spike from the solenoid has damaged the ECU, hence the error.
I have replaced the diode hoping that it was the problem but it appears it isn't as the bike still won't start. When I press the start button there is a click and the headlight goes out but nothing more. I have tried bypassing the side stand switch but that doesn't do anything so I'm assuming that it is the ECU.
Have you checked the starter solenoid? The preceding ST4S had a notorious connector onto the starter solenoid that would come loose. The solution was to cable tie it in place. Before you write off the ECU do the cheap stuff first. New relays, is the battery up to the job, new starter solenoid, secondary earthing strap from battery to starter bolt on engine. These should be considered first.
It comes from the light relay which sits next to the fuse box and as it clicks it turns off the main beam.
Ok thanks Chris I will check all of that over the weekend but the problem definitely started as soon as I put the battery on the wrong way! When I realised what I had done I put it on correctly and there was nothing but a click.
Morning Chris, I am trying to work out how to PM you but I can't seem to find a start a conversation button anywhere so if you could point me in the right direction that would be a help, thanks.
You haven’t enough posts to start a conversation with Chris, he’ll need to initiate a conversation possibly.
Just an update on my error code, I managed to get hold of an ECU from a 1098 which I sent to @chrisw who mapped it along with the original ST3 one. I tried the original ST3 one first but it still came up with the error code so wouldn’t turn over. I then tried the one from the 1098, turned on the ignition, the error code was gone and it fired up straight away. I checked to see if the light dimmed when I pressed the start button which it did and also put it in gear with the side stand down and it cut out as it should. So, massive thanks to Chris for sorting it out for me and from my experience it would seem it was the ECU which got damaged when I put the battery cables on the wrong way so if you are unlucky enough to do it maybe start by looking there.
