Cooling Fan Not Working - P0481 Error

[Aldeburgh]

Hi,

My cooling fan doesn't work. It's the type with a silver resistor but doesn't work on either low or high speed, so the car (facelift 2.5 Auto) overheats when stationary (only done to test).

TOAF gives me:
P0481 - Cooling fan 2 control circuit malfunction
- short to ground
- no signal detected
- sporadic error
- fault present

Does that mean I need to replace the fan unit, or might there be errors in the wiring before the current gets there? I have a few other "short to ground" errors as well affecting other components (e.g. K bus). Just not sure where to start looking now.