[Stoppablenut]

My rad fan isn’t coming on and my temp isn’t registering on my 800 terralander. The fan does work when I connect 12 volts to it. Would the CTS be the problem? I was thinking the thermal switch on the rad but the CTS is what registers the temp correct?

[NMKawierider]

Discussed in other thread. Can you confirm the coolant is full, free of air bubbles and is moving? My concern is that the pump isn't circulating the coolant by way of an impeller or drive failure or stuck thermostat.

[Stoppablenut]

The coolant is full and I did bleed the air out. I can feel the hoses and rad getting hot, and with the cap off can feel the coolant heating up. I do see I have coolant dripping from my leak indicator hole at the bottom of the water pump, I’m assuming that is the seals need to be replaced.

[NMKawierider]

Is there anything else electrically not working or working correctly? Maybe on the weep but that won't effect the gauge or the fan if the radiator is full.

[Stoppablenut]

As far as I can see electrically everything else is working. After the bike running for 5 mins or so my efi code signal comes on and just stays solid, I’m not sure what that means I kind of assumed maybe over heating? At that point I shut the bike off hoping not to do any damage. I think maybe 10 mins was the longest I had it on

[Stoppablenut]

At the same time if it’s not reading a temp on the gauge then it’s prob not over heating lol.

[Stoppablenut]

so just an update on my bike, in total I found bad seals in the water pump (which I'm not a big fan on how you need to split the case to replace), a bad rad fan switch and it appears my Temperature sensor is fried as well. I replaced the bad seal, replaced the rad fan switch, gave it an oil change, filled with new clean coolant. I'm still waiting for the temperature sensor to come in the mail but seeing as a lot of bikes don't have temp gauges i'm not too concerned with it.

One more thing does anyone know if I need to take the bike in to get the faults cleared with the PDA or will they clear themselves or is there a reset procedure?

[NMKawierider]

so just an update on my bike, in total I found bad seals in the water pump (which I'm not a big fan on how you need to split the case to replace), a bad rad fan switch and it appears my Temperature sensor is fried as well. I replaced the bad seal, replaced the rad fan switch, gave it an oil change, filled with new clean coolant. I'm still waiting for the temperature sensor to come in the mail but seeing as a lot of bikes don't have temp gauges i'm not too concerned with it.

One more thing does anyone know if I need to take the bike in to get the faults cleared with the PDA or will they clear themselves or is there a reset procedure?

Far as I know MIL codes are not saved so no clearing is needed. Also the ECM uses the temp sensor for the FI system but not the fan or thermoswitch. Never heard of a CFM temp sensor failing but..have heard of many thermoswitches and some oil pressure switches.

[Stoppablenut]

I have not actually tested the temperature switch i just came to the assumption that it wasn't working. I have 2 bikes the terralander and a 500 trail tracker and neither of them seem to have a working temperature gauge. both had bad thermal switches, the trail track actually had a bad switch and a bad fan. The trail tracker i put on a manual marine on/off switch until the proper thermal switch comes in the mail, but appears to be working.

what are some of the possible symptoms of a bad oil pressure sensor?

[NMKawierider]

what are some of the possible symptoms of a bad oil pressure sensor?

Just two- the first is that the light or indicator comes on when it shouldn't...but it also can be working correctly and there is a pressure problem, or that the pressure light never cones on, not even when the key is on but not running.

[Stoppablenut]

Ok thanks. I'm fairly confident i don't have any issues with the oil pressure switch just making sure i wasn't missing anything, but if those temperature sensors don't go bad often maybe ill need to investigate that a bit farther considering neither of my atvs are registering temperature.

[NMKawierider]

Ok thanks. I'm fairly confident i don't have any issues with the oil pressure switch just making sure i wasn't missing anything, but if those temperature sensors don't go bad often maybe ill need to investigate that a bit farther considering neither of my atvs are registering temperature.

Fan switches-all the time go bad. The actual temp sensor..not very often.

[Stoppablenut]

ok thanks the fan switches were both toast for sure, its just temp sensors i need to confirm are toast i just assumed they were since i was registering and temp on my gauge.

[Stoppablenut]

Meant say since I wasn’t registering a temperature

[Skogsvarelse]

if you haven't replaced the thermoswitch do it because the can go bad and stop working. the fan will fork if you take the conector out of the thermo switch and put something that leads the electricity to both pins in the conector on the cable and the fan will start even with the termoswitch does not work.   You maybe need to clean the temp sensor conector with some electrical spray if it somehow have com in som water or moister in the temperature gauge.