Does the Pioneer DEH-P8600MP have aux cant seem to find it

SOURCE: aux port

Turn off Radio with car on or key on. Press and hold the big volume button in for 3 seconds, and the radio will say initialise. Than press the FCN button till it says AUX. Than press the SEL button till it says "Aux ON ". Turn on radio and you should be good to go.

SOURCE: DEH-P6800MP Pioneer AUX Input

plug it in right below the sat icon on face it is a 2.5mm plug end so in most cases you need a 2.5mm male to 3.5mm male

SOURCE: aux

there is an interconnector to connect this unit to the aux source (CD-RB20/CD-RB10)(sold seperately).
After connecting, press SOURCE until AUX appears in the display.
Press "play" on your ipod.
i sincerely hope this answers your question.

SOURCE: Aux and sub settings

you have to turn the headunit off using the headunit (there is a button that says off or power just cant remember which one) once its off and is displaying only the time you hold the function button and all the other options will come up.

SOURCE: pioneer DEH-P780MP

turn your head unit off, hold the function button and the functions menu to toggle the aux issue will pop up. its like an "off" function setting