No idea. Never been measured.
I inspected the fan relay. All the connectors looked good. Jiggled and pushed them all in to make sure they were fully seated.jimmy57 wrote: If the low speed connector comes off its pin on fan relay then the high speed fan will be triggered at a higher temp. The plastic on those "bullet" style connectors disintegrates and the grey plastic connector body can't keep them on. Easy to inspect. Look just under that top fan shroud plastic bar for the big rectangular relay and see if the grey plastic two wire connector has a loose wire. If it is loose then push it back up on the pin on relay.
Okay, now it's data time. Figured out how to make my OBDII scanner read live data. First I started the car and let it warm up a bit. Ambient temp 83F. ECT read 90F at startup. Turned on the A/C to see if that would make the fan come on. Fan came on when the needle hit 4 o'clock (sorry, but wasn't looking at the scanner). A/C was blowing very cold on max cool. Drove ~1 mile on a dirt road, second gear, ~20mph. Temp hovered around 190F with peaks at 193. Turned on a main road, put the hammer down, temp shot to 204 before I let off going into 3rd. Drove a few miles always in 3rd gear between 2000 and 3000rpm. Temp stayed between 190 and 202. Stopped for a hard left back onto the dirt road, and temp shot to 207 very briefly before I started moving again. Went 1 mile on a hilly dirt road, 2nd gear, ~20mph. Temp started at 194, climbed slowly as I was travelling uphill and peaked at 215F at the crest of the hill (needle one notch above 3 o'clock), then just before I let off the temp began dropping. Downhill it was at 190-193 and stayed there the rest of the way. Parked the car, turned off the A/C, turned off the blower. Temp slowly began climbing from 193F while it idled. At 205 the fan did not come on. After a few minutes, it hit 215F and the fan finally came on. Temp peaked at 217 (needle about where pictured above). Temp steadily dropped to 199F and fan shut off, needle back at 3 o'clock, I turned off the engine, and turned the key back to 'run' position. Watched the temp go back up to 204 with spikes up to 208F. *All temps are in degrees Fahrenheit converted from Celsius by the scanner.
Based on what I've read, the fan should come on with the engine off over 205F? The fan spun with ease, key still in position 2 (yes I realize this isn't a smart idea). I could hear an electrical buzzing noise with the key still on pos 2. It was coming from near the fan motor area, picture attached.
Assuming The ECT is reading the correct temperature, and that the scanner is translating the temperature correctly, and since the temps are within normal operating range while the vehicle is moving at normal road speeds, It would appear that the issue lies with inadequate airflow passing through the radiator. I'm guessing for some reason the low speed fan is not coming on. So once again it looks like I'll be chasing an electrical issue.