TCC Modes?

[DrX]

Been logging my 80E. What is "AppEn" mode? i.e. what physical changes occur in the trans from "Off" to "AppEn" to "App" ?

Edit: I found the reference material posted by joecar: http://forum.efilive.com/showthread....rence-Material
The chart below describes the apply sequence. I presume that AppEn is stage 1. Now my questions are;

1. Is there any situation where the PCM would only command stage 1 without proceeding to lockup?

2. Can this generate excess heat? It appears that there is neither apply nor release pressure on the TCC during this stage. (release pressure is removed)

* note this trans has been assembled to run full time high line pressure