> I did check the coolant temp sensor resistance and the ohm range seems
> fairly accurate between 740 and 1400 ohms from hot to cold
>

I don't have a Bentley handy, but these values don't sound right. Depending
on your definition of cold, the resistance could/should be much higher. At
operating temps I seem to recall using a 200 or 300 ohm resistor to replace
the temp sensor.

Check the manual.

Angus