You can probably pull out the fan motor and clean it, and get it to run another year or so. Maybe two years if you keep AC and heat down. The replacement TYC is half the cost of Volvo and has good reviews.
Without VIDA you can’t tell if the solenoid is working correctly. The Ohm test is a rudimentary diagnostic and not definitive for a good part Try a junkyard part replacement, with a new gasket. Inspect connector wiring carefully There is a chassis break ON this part in 2001 so you need To order/ sea...
In North America it will say CEL which is Greek for check engine light. No foreign letters allowed on dashboards here, we build wa λ λ s to keep them out.