can't find cooling fan relay - MVAgusta.net
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post #1 of 22 (permalink) Old 03-11-2013, 07:01 AM Thread Starter
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can't find cooling fan relay

Hi, my cooling fan circuit conked out a week ago. I've check the fuse and looking at manual for 2006 910s and can't find the fan relay. It's not obvious and the manual refers to p.38 but there's nothing there about a relay. Help, plz, going nuts

cheers, Claudio

Brutale 910S 2006, KTM SMT 990 2009, Suzuki V-Strom DL650A ABS 2010 (ex BMW R1150RT 2002)
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post #2 of 22 (permalink) Old 03-11-2013, 08:27 AM
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Claudio, I'm pretty sure the SPU controls the fan on the Brutale, meaning it's a relay inside the SPU. I might be wrong, which drawing are you looking at.

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post #3 of 22 (permalink) Old 03-11-2013, 08:24 PM Thread Starter
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Claudio, I'm pretty sure the SPU controls the fan on the Brutale, meaning it's a relay inside the SPU. I might be wrong, which drawing are you looking at.
manual from ur teamdouble3racing site called "mv-agusta-brutale910_chassismanual.pdf" total 396pp. I'm looking at manual on absolute page ref. 164 (E5). On p.201 (E44) says check fan relay on right side of motorbike as indicated on p.38???

I've done as instructions on p164 and bridged the temperature sensor plug marked M and the fan doesn't kick in. I'm not getting voltage on either side of the fan fuse 7 with ignition ON but motor not running (I've checked and replaced the fuse). I've checked the fan motor with ohmmeter and seeing about .2ohm. I've yet to put 12V on it to test the motor to double check

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post #4 of 22 (permalink) Old 03-11-2013, 09:08 PM
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Yup, sounds right, or wrong for that matter.
Yes the fan should have kicked in, and no, there is no relay outside the SPU.

If you look at the wiring diagram, follow the lines indicating the fan wires, they go straight to the SPU.
Run two wires from your battery to the fan to do a quick test on that also.

Where are these smart arse Brutale riders when you need them ?

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post #5 of 22 (permalink) Old 03-12-2013, 03:28 AM Thread Starter
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put 12v direct to the fan and it works fine. I've been pouring over the electrical diagram along with an engineer mate of mine and we can't get our heads around it as far as the fan circuit. In the electrical diag on p163 (E5) one side of the fan goes to common ground and the other heads off to the right then up to a connection 10? on what looks like a bus perhaps the fuse panel. We can't figure out how this relates to fuse 7, which is supposed to be the fan fuse. How this ties up to the fan relay (whereever that is?) and the Power unit is beyond me. I must be missing something.
Any help appreciated, cheers Claudio

Brutale 910S 2006, KTM SMT 990 2009, Suzuki V-Strom DL650A ABS 2010 (ex BMW R1150RT 2002)
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post #6 of 22 (permalink) Old 03-12-2013, 03:48 AM
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No Claudio, the big square thing you see with all the connections is an SPU(Control box). In there is various relays which control various fuctions on the bike. There is no seperate relay for the fan. The fuse feed goes to and then through the SPU to feed the fan.

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post #7 of 22 (permalink) Old 03-12-2013, 05:21 AM Thread Starter
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Hi Donsy

ah, ok. So, back to my original problem with the fan not coming on when temp is over 94. Where do I backtrack to find out where the circuit is broken? I assume that at ambient temps there's no voltage coming out of the SPU. That might suggest the coolant temp sensor but I am getting a temp reading on the dashboard panel. If the fan fuse feed is between the battery and the SPU, I should see 12v at the fuse with the ignition ON but I'm not. Is this right?

thanks in advance, C

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post #8 of 22 (permalink) Old 03-12-2013, 05:31 AM
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You have 2 temp probes (Item 22 and 36), one on the radiator which feeds the display, one on the engine which feeds the ECU. The ECU then tell's the relay inside the SPU to start the fan. Swap the connectors on the 2 temp probes and see if there is still a display reading.
Check this first mate.

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post #9 of 22 (permalink) Old 03-12-2013, 07:29 AM Thread Starter
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will do tomorrow, thx donsy

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post #10 of 22 (permalink) Old 03-12-2013, 06:28 PM
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Forgive my ignorance, but is the wiring that different to an 06 F4? I encountered same problem and had to replace the relay and fix a broken wire.
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