Don't know why,

tried PQ's tut on render passes and mine are all black, not sure wth happened.

Im not sure why theres diffuseExport.. never seen the tutorial btw.
But the place where you typed diffuseExport theres a dropdown menu on your right where you can select direct diffuse which should give you the diffuse.

For specularExport that would be direct reflection.

Once again, never seen the tutorial so I dont know why theres a diffuseExport being typed down.. maybe have to do with an older version of houdini..

Old version, kinda frustrating though.

Hard to figure out which passes I need to grab for the basic ones.

Diffuse
spec
AO
shadow/light
effects
depth