Found the offending part, causing my overheating problems in my 2004 V35 350GT Coupe.
Changed the coolant temp sensor part no TCS-075, ($20 from eBay Supercheap Auto), and found the problem still existed.
Next, investigated if there was any electrical faults
Using a multimeter, verified continuity of wiring to the fans, and verified correct voltages going to both fans - check
Then checked the operation of the fan motor, by directly connecting fan to battery - Bingo!
The fan did NOT turn, unless you pushed the blades to start it off.
Removed the fan completely from the car, and verified again, and yes....I need a new fan.
Now there are aftermarket fans for around $40, which state "compatible" with Nissan 3.5L V6, but I'll try for genuine part is not too expensive, as they will definitely look better!! (apart from bolting directly on).
Can anyone give advice?
mikef56