It's curious to me that the workshop manual does not specify a temperature for the cooling fans. However, I think you can infer from the thermostat specs. Thermostat starts to open at 176-184 and is fully open at 203. Presumably, the cooling fans are not needed unless the temp exceeds 203.
Also, the fans are two speed. I can hear high speed from the cabin. Not sure I notice low speed.
Finally, as a point of comparison, my '06 temp gauge sits at 200 when stuck in traffic on a hot day with A/C on. It generally reads 170-180 while cruising.