You can check you coolant temp readings using the graph and a DMM and also verify that the coolant temp sensor is accurate.
If you look at the Y-axis at the 60° C and then move to the right on the X-axis at 1.25vdc and where they intersect you see the temp should be 56.06° C @ 1.25vdc.
To convert °C to °F use °F = °C * 1.8000 + 32.00
You can also use this graph to figure out what coolant temp you have when say the 2nd bar shows and the 3rd and so on so you have a better understanding of temps that you have when each bar shows.
