i was talking with someone when he had mentioned that if i was able to find a 0-5v input on the 7730/7727 ecu i could use that for a wideband instead of using say map2 and recoding it all to work...

now, i dont have a 7727 or a 7730 ecu at my fingertips, so i ask here, if anyone knows what pin it is ?

i was looking here 1227165 Schematic and i cant seem to find it

thanks in advance


[edit] just realized i was looking at the wrong schematic lol
1227749 Schematic

still cant seem to figure out which is the corrosivity sensor

 

In the $88 mask the corrosivity sensor is on ADC mux channel 1, which is pin F12. This pin has a 348 ohm pull up on it. For the least amount of interference I always recommend the TPS2 input. For a filtered input use MAP2.

The pin F11 has a 2K ohm pull up on it. This is ADC MUX channel 2.

RBob.

 

ahh thanks.
im newb to hc11 hacking, so this is difficult for me to understand
does the f11 have instructions in the bin to be read from?
and f11 is the actual pin on the harness plug f, pin 11 ?
if i could get a pic of the 7727 harness would be good, as i think thats what ill be using

 

The pin F11 is that connector pin. These are for the '730 which has a different pin out then the '727. The code to read that pin is 2 instructions: load a register with the MUX channel to read, a JSR to the ADC routine. Returns with the value in reg A.

RBob.