as others said its probably the belt slipping.

the pump looks to be either the air con compressor or the power steering
pump...

"Al Reynolds" <al@bat400.com> wrote in message
news:bg5dfc$5c31d$1@athena.ex.ac.uk...
> Hello people,
>
> I wonder if someone could help me out? I need to
> identify the belt indicated with the arrow in the image:
> http://www.bat400.pwp.blueyonder.co.uk/engine.gif
> so that I can explain to someone over the 'phone what
> the problem is on my car. There's no Haynes manual
> for this model so I haven't been able to look it up.
>
> Could anyone tell me which belt it is? Sorry if this is
> something that I should obviously know!
>
> Thanks in advance,
> Al Reynolds
>
> PS While I am here, you might be able to help me
> with the problem as well ... so here goes. My Accord
> tends to idle at just under 500rpm. This seems low to
> me (my previous Prelude used to idle at ~700rpm).
> Recently, a "squealing" or "whistling" noise started
> coming from the engine bay every time the engine was
> idling (at lights, before parking etc.). The whistling
> would go away if I raised the revs even slightly, even
> while in neutral. I managed to track the whistling down
> to the area around the belt marked in the image. It's
> stopped now but I was concerned that something
> might have worn down or need changing.
>
> Any ideas what it could be?
>
>