The thermo fans on my 999 are not running. Both fans are supplied with 12v positive from the battery (unfused according to the wiring diagram), and the switching of the negative is done by the ecu. (This can get confusing for some. Electron flow in Australia is from +ve to -ve, whereas in in the US they flow from -ve to +ve). There are no relays.
Thermo fan function then is controlled by the ecu, so if the engine temp sensor is functioning ok (as exhibited by the dash and IAWdiag), how do I fix it?
EDIT
I've just read some past posts that state the fans don't come on till 220F, or 104.4C. Is this true?
I only got up to 104C today, so technically they perhaps should not have come on?? It was ambient only about 28C here, and we get days to 38C.
Can it be reprogrammed?
Regards, Greg.
Thermo fan function then is controlled by the ecu, so if the engine temp sensor is functioning ok (as exhibited by the dash and IAWdiag), how do I fix it?
EDIT
I've just read some past posts that state the fans don't come on till 220F, or 104.4C. Is this true?
I only got up to 104C today, so technically they perhaps should not have come on?? It was ambient only about 28C here, and we get days to 38C.
Can it be reprogrammed?
Regards, Greg.