Anthonypowell said:
Hi
Can anybody help, on my Tenere the Cooling fan has stopped working, have checked the Fan which is working fine and swapped relays and this makes no difference, just wondering if there is a temperature sensor to activate the fan within the radiator.
Thanks
Tony
Yes, there is a coolant temp sensor located to the right of the thermostat cover between the throttle bodies. Though if you're seeing a coolant temp reading on the gauge cluster, that would indicated it's working well enough.
page 8-29 in the 2014-2015 FSM, (sorry, no longer have a '12 manual), offers some diagnostic checks. Not sure if things are the same for the '12, but there is a radiator fan fuse, so check that if you haven't yet. Sounds like you believe the relay is ok and you checked the fan itself already, (applied 12v and it worked?), so that leaves the coolant temp sensor, wiring and the ECU. Usually it's the cheap and easy stuff.
If you haven't done so yet, check the fuse for the radiator fan motor. (I assume the bike runs fine otherwise, if not, check the fuel injection main and ignition fuses as well).
The FSM suggests checking the main switch, fan motor and fan motor relay next. Note that although the relays appear to be the same,
at least for the 2014/2015,
they are not and require different test processes. They fan relay is shown as fairly standard, but with different pins being the output than other relays of the same physical configuration. Swapping relays might not be an adequate test. (FWIW, the headlight relay
appears to be the same configuration.)
Then pull the air box so you can get to the coolant temp sensor. Checking the coolant temp sensor requires removing it and immersing it in water of different temps, then checking the resistance across the pins with a DMM. 2320-2590 ohms at 20C and 310-326 ohms at 80C are the two tests listed.
Don't get the terminals wet! The torque for the coolant temp sensor is 18 Nm (1.8 m-kg, 13 ft/lbs)
Hope this helps. As an aside, if you applied 12v to the fan and it seems to operate normally with brisk rotation, checked the fan motor fuse and tested it with a DMM for continuity, (a fuse that looks good can still be bad sometimes), I would test the relay before digging further, especially if you are still seeing apparently good temp readings on the dash read out.
Apply 12v and ground to the upper pins in the T shaped connector of the relay, look for continuity in the two pins in the leg of the T. With the T shape, + is shown as upper left with - as upper right. Tester + probe as bottom of the T leg and tester - probe as next up from the bottom of the T.
