Sounds like that book has some good info in it. It there anything in there that could make sense of this trans datastream portion of the hac?

Code:
L53F3    FDB $0010      ; 11,  MALFFLG6, ERROR WD 6
                    ;
                    ; b7 1 = ERR 57. (not used)
                    ; b6 1 = ERR 58, XMISH TEMP HI
                    ; b5 1 = ERR 59, XMISH TEMP LOW
                    ; b4 1 = ERR 61, TURBO BOOST SENSOR HI
                    ;
                    ; b3 1 = ERR 62, TURBO BOOST SENSOR LOW
                    ; b2 1 = ERR 63, BARO SENSOR HI
                    ; b1 1 = ERR 64, BARO SENSOR LOW
                    ; b0 1 = ERR 65. (not used)
                    ;-----------------------------
L53F5    FDB $001B      ; 12, CURMALF5, CURRENT ERROR WD 6
                    ;
                    ; b7 1 = ERR 57. (not used)
                    ; b6 1 = ERR 58, XMISH TEMP HI
                    ; b5 1 = ERR 59, XMISH TEMP LOW
                    ; b4 1 = ERR 61, TURBO BOOST SENSOR HI
                    ;
                    ; b3 1 = ERR 62, TURBO BOOST SENSOR LOW
                    ; b2 1 = ERR 63, BARO SENSOR HI
                    ; b1 1 = ERR 64, BARO SENSOR LOW
                    ; b0 1 = ERR 65. (not used)
                    ;-----------------------------
I was thinking it might be something used in the diesel engine TCM.

Can you shed any more info on any unlisted I/O pins?