[W126 Coupe] CIS-E Blues

[Robert Karl Stonjek]

> You have not mentioned testing the coolant temp sensor; this will cause  the 
> symptoms you describe exactly.
> Steve 
> 

Steve,
I checked the resistance of the sensor under various conditions and it matched the expected resistance at the temperatures tested.  I also note the change in the temperature voltage sent to other devices from the CIS-E (KE) unit and it changes as expected.

But you're right - just about anything and everything plugged into the CIS-E can cause the fault condition, which is why I've taken to singing the blues on this forum :)

Thanks,
Robert
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