This makes no sense!

Let's try this. Voltage at pin 29 coolant temp/voltage...

20c/3.4vdc 60c/1.5vdc 100c/0.5vdc

Pin 28 is 5v ref and 29 is return voltage used for coolant temp input. If with the connector off the CTS you still have voltage on pin 29 the... Login to read more.