If the belt is loose, it will feel loose. If it doesn't feel loose, meaning there is no movement of the tensioner arm when you pull on the belt, then consider the belt tight enough and move on.

Your pressure readings are virtually the same every time it trips out.

It would be interesting to have a voltmeter on the low pressure cutout switch and see if the voltage there trips when the clutch quits or if the voltage remains when the clutch trips. This would tell you if the CCU is giving up its signal or if the Klima relay is tripping. If the voltage remains after clutch cutout, then the CCU is still asking for compressor and the Klima relay or circuit is the culprit. If that is the case, an ice cube relay in place of the Klima should fix you up.

If OTOH the voltage at the low pressure switch goes away at clutch cutout, then the problem is in the CCU system, very possibly a temp sensor or temp sensor circuit.

Hmmm, I can pull the belt up and the tensioner moves some.

This is one of those things that's difficult to describe. If the tensioner is in good shape and properly adjusted you might get a very slight amount of movement. The key is feeling tension on the belt such that the belt is wrapped with full contact around all pulleys. If there is not enough tension such that the belt is not pulled down in full contact with the pulleys it is not correct.

Hope this helps

Hello,
I've looked and there's a lot of references to the Ice Cube relay to bypass the klima, but I can't find the specs for how to do it. Anybody have a PDF or anything that describes what it is and how to do it? I did a search on Ebay, and there's a ton of things called Ice Cube relays!

Thanx!

p.s. still workin' the problem here. It ain't grease though.