chirp/squeak noise just off idle when cold

[tadc]

Originally Posted by RedRide

You must be careful not to over tighten the belt as it could case the altenator, water pump bearings, etc to fail.

Thanks for the replies.
That's what makes me reluctant to tighten it. Also - I'm not too familiar with the Yaris's layout, but isn't this a serp belt with a spring tensioner? If that's the case, there isn't really anything to "tighten", right? The tensioner applies tension and thats that?

Does anybody know off the top of their head what's the service interval for the belt?

Thanks.