I guess my issue was not appreciating the mix of digital values and analog values, something that would never have occured to me; my brain thinks in either one *or* the other.
Just for the hell of it (and at the risk of boring everybody with too much detail), how would you interpret the Error Code results for Table 6-4 in the Service Manual under Test 02? The error codes range from 01 to 65; are these also summed results of binary values, or is there another interpretation?