re: 1994 E320 w/ASR

Puling fault codes is great stuff but it seems like the real art is in interpreting the information. My ASR light came on again recently and the car went into the limp home mode. I pulled the following codes, which I'm pretty sure were all related to the event.

DM LED - code 6 - Idle speed control faulty
DM LED - code 26 - upshift delay faulty
Pin 8 - code 8 - ISC indicates limp home mode
Pin 14 - code 14 - closed throttle position contact switch

So which code(s) are the source cause of the problem, and which are an effect of going into the limp home mode. I'm guessing that source problem codes are 26 (upshift delay faulty) and/or 14 (closed throttle position contact switch) and that codes 6 (ISC faulty) and 14 (indicates limp home mode) are just an effect of going into the limp home mode. Any thoughts on identifying and fixing the source problem would be appreciated.