88crxSi

c9 = red/wht
c12 = grn/wht (gnd)
c13 = yel/wht = (5v reference).

have fun

Tom-Guy

Yeah, let us know how it turns out.

I feel bad for some of you grey market guys whose cars have small quirks and knowledge about them isn't as fluent... but this isn't a big deal, just takes some determination and a little work.

gary_yuen42

Joseph you pointed out the AP could be the same as a MAP sensor earlier.... Hence I am wondering I could just wire in the map sensor so it act as a AP sensor?

I haven't seens a AP sensor yet I have ask the Rover guy that sold me the ECU (as his car is for breaking) to get me the AP sensor he can't locate it either.. but I am assuming it would have a 3 wire plug? Hence if thats the case and if the MAP sensor can be used as a AP sensor, then maybe could try to tap into C12 and C13 accordingly then add a pin to C9 and connect the last wire... what you reckon?

As I got the manifold from the D15B7 it has a MAP sensor on the manifold and the D15B2 is seperate and mounted on the firewall... which is retired from action and could be used elsewhere if compatible...

norwegian cRxXx

BIG thanx to crx88si..


I also have an extra MAP sensor laying around, so if MAP an PA are the same, i might use the MAP instead..
would be fun to find out.

btw, in all the wiering diagrams the Atmospheric Pressure (baro) sensor are refered to as a PA sensor, not AP sensor..

gary_yuen42

I am itching my hands.... I might just try it tomorrow.. but hopefully someone can answer then I know for sure about the "PA" issue :P.

Oh yea was speaking to xenocron about CEL and disable them in turboedit... he was saying about NOCEL.EXE.. maybe an option also but need looking into.

norwegian cRxXx

I think the CEL is there becouse the car is suposed to have the same fault finding prosedure as obd-1 cars (use the jumper wire and the engine light flashes), but since the pm7 ecu has the diode on the ecu things crash. when i get the time i will read some diagrams and then hopefully cut som wires, and hopefully the CEL will go away, and hopefully the engine light will still function as it should when you turn on the ignition..

Tom-Guy

Yeah, I got AP confused with PA, you're right. Dyslexia owns.

Your problem might be that the B2 ECU had internal PA, or didn't need one, and the MPFI ECU you have is meant for external PA, which you don't have a provision for until you wire one in.

I dunno 100% about PA and MAP being the same, but I bet the Helms manuals found in the download section off of www.deliii.com will tell all. They give a nice MAP sensor pressure:voltage chart, and I don't see why they wouldn't do the same for an AP.

gary_yuen42

I have wired in the MAP sensor to act as a PA sensor... : -



Using D15B7 MAP sensor plug and D15B2 firewall mounted MAP sensor: -

1) Add pin to C9 as signal wire

Map Sensor Plug ECU harness Side
White to C9 (Signal)
Green/White to C12 Green/White (Earth)
Yellow Red to C13 Yellow/White (+5V)

Now the car when switched on the first time, the CEL goes out and won't come back on (which previously did) which is good.

HOWEVER : -

If you try to turn on ignition (without starting the car).... then switch it off. Then do the same again, the CEL won't come on at all, no fuel pump whin or the relay click.

BUT: - even then the car starts fine. When once you started the car, the next time you turn the key (without starting the car) the CEL will comes on and goes out again as normal. Then repeat switch it off CEL won't comes on.

So to conclude the CEL will comes on normally first time, unless you start the car the CEL won't comes back and without the fuel pump whin and relay click noise. Even the car starts ok. Only you will hear the fuel pump + relay when CEL comes on normally.

gary_yuen42

Just done more observation.... it seems that the CEL will comes on again without starting the car but have to count 1-5 then turn the key again.... and it doesn't seems to be throwing any codes as I have the LED on the ECU.

norwegian cRxXx

that's just amazing.. i will do that tomorrow..
does the car run good? engine sounds fine?

i think the engine light is supposed to act that way when you turn off, and on the ingnition, becouse you still got maximum fuel pressure..