is there a way of testing the fan is functioning using the clocks? I know you can enter some sort of diagnostics mode but will it test this?

Its an r1 5pw

Don't think so but I could be wrong...

Why not just put 12V across the terminals of the fan - if it rotates its working, otherwise its F*%ked :-)

- Paul

[Edited on 29/1/09 by progers]

I know the fan works what im not sure is happening is i dont know whether the ECU is signaling the relay to activate the fan. I have run the engine up and it hit 120 degrees so i killed it and the fan hadnt come on

Is your thermostat working properly?

Phil

In that case you need to check the voltages at the relay. Either the relay is not being activated by the ECU, the relay is duff or the ECU is not getting the correct temp reading from the water temp sensor.

The fan relay coil has 12V feed via Red/white wire and the activation is controlled by the Green/yellow wire. It is pulled towards Ground when active. Probe the green/yellow wire and you should see it change from 4.5 -5V to something approaching 0V when engine is hot. Check the 12V feed (green/red) is OK if ECU is doing its job OK. If ECU not behaving, first port of call would be to would check temp sensor.

An alternative is for you to control the fan manually. Easy to wire the green yellow to a toggle switch on the dash, that way you can switch fan as soon as you get stuck in traffic (for example) rather than waiting for it to kick in.

Hope that helps

Paul

Hi Paul,
I dont think you can run diagnostics to turn the fan on but i think you can measure the resistance of the sensor when running to determine if the ecu is receiving the right signals. Have you got a haynes? if not il have a check when im in and see what it says.
Adam

My dash is reporting the correct temperature so the sensor must be working im just not sure what temp the fan should come on

I know bike engines run a bit hotter than my old pinto but i got the temp light on so i assumed it should have come on by then I tested the fan so i know that works its just knowing when to test the wire out the ECU to see if it is supplying the correct signal

Can't remember exactly but I think it cuts in at 110'c (might be 105).

adrian