Well it seems that as my mileage climbs, so do my issues.
06 XB9SX 90 000km.
I just replaced the pump assembly last month, and its been running great, but
yesterday the CEL started coming on each time the fan should have engaged.
I have done the following:
Fan was replaced about 6 yrs ago.
Unplugged the fan connector and applied 12V to the fan, it runs, albeit slow.
Ran a fan test using Buelltooth.. fan does not run.
Tested ECU pin 6 using fan test, and it does apply a ground onto the black/orange wire.
Tested the black/orange all the way to the fan connector, and the ground works all the way.
Tested wiring to ground and to positive with both ends disconnected, all tests correct.
Tested 12V and ground during fan test, and all tests correct at the connector.
The fan tests approx 5 Ohms across the motor. Not sure if this is correct.
What I did find strange is that the CEL comes on intermittently even straight after startup
when it is cold. When out on the highway at 120+ kmph, it never comes on.
I'm hesitant to start throwing parts at it without understanding why I get these symptoms.
Would it make sense to extend the wiring and connect my wife's XB's fan and re-run the fan test ?
If it does work, does that indicate that my fan is faulty?
I have done some reading, and it appears that there are cases where a fan "tested" ok, but wasnt.
All ideas/suggestions welcome.