Hey guys, which pin is the MAP sensor on an OBD1 p0a ECU? The workshop manual i have says it is D19 (though this manual is for the CD7-9, i would expect no difference to a CD5). However, using this pin i just get a constant 4.5ish volts from it no matter what according to my datalogs. This is obviously not right!!

Other OBD1 ECU's seem to have it on D17 i think?

Cheers

 

Not sure on a P0A. On a P28 d17 is sensor input, d19 is ref voltage, and d21 is sensor ground.

 

yeh i'm thinking its D17, as when going to P28 tehre is no need to change any pins other then A6 and A11...

D19 being ref voltage makes sense as well

 

OK, D17 looks like its working great

Now, the next question...i've thrown a CEL, and when i jumpered it the ABS light started flashing, not the CEL. Is this normal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poid &raquo;</TD></TR><TR><TD CLASS="quote">when i jumpered it the ABS light started flashing, not the CEL. Is this normal?</TD></TR></TABLE>
Yes, if it's a constant steady flash there is no problem. Or is it flashing a code?

 

looks like its flashing a code...there's 2 flashes, a pause then on flash, does that 3 times

The CEL doesnt flash at all

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poid &raquo;</TD></TR><TR><TD CLASS="quote">looks like its flashing a code...there's 2 flashes, a pause then on flash, does that 3 times
</TD></TR></TABLE>
That would be a code 2-1. I'd clear it and see if it comes back.

 

comes back each time with the chipped ECU (p28 running Uberdata), but not the stock p0a

I best double check everything, i am sure the bin is OK though