Master pinout/16236757

[ericjon262]

a little update:

in the shortstar bin there is a setting for crankshaft resolution,



so maybe changing the setting to 1 for the 7x/24x settings, and running a 3 wire crank sensor on the 7x trigger to bypass the ICM could net coil per cylinder ignition.

for the crank sensor, I was thinking about the possibility of using a cam position sensor. it may need a sleeve to fit the sensor hole, and to adjust the depth, but I think it should probably work.


This is all assuming that this flag doesn't switch the entire ignition system from CPC to DIS.

[ericjon262]

i would be quite surprised if the two weren't 100% signal compatible.

me too, but I've seen several times where GM has done some straight up screwball stuff before...

[robertisaar]

i would be quite surprised if the two weren't 100% signal compatible.

[ericjon262]

found an interesting bit of info, both LX5 and LSx wire up in a similar manner, but the LX5 uses one large ICM, and the LSx engines use ICM's integrated into the coil. whether or not the PCM is capable of controlling the LSx coils or not, I'm not sure, for that we need more information.

LSx





LX5

[ericjon262]

ok, here's an interesting update:

12200411 or 0411 as it's more commonly known is a V8 PCM. well, it turns out, it is also a V6 PCM, used in 4.3 V6 applications from 2001-2002. not sure if this means anything for us yet, but I though I would share.

[ericjon262]

I added a link in the first post to a table I made listing each vehicle in it's own column, I found another interesting application, the olds aurora short* V6. I was going to hit a JY today to get a PCM for the bin file, along with the rest of the parts that I need for my desktop PCM reader/flasher.

[TGP37]

Ah yes I see what you mean. Packaging is something to always consider, twice as much for a Fiero. I do like the idea.

[ericjon262]

the switch swap was too easy to worry about messing with a relay

good point. Especially using only 12v. Maybe a different story with 120v, but this isn't an RV...lol

again, the switch was too easy to implement to worry with a relay.

again....?

it seemed like you missed a post in there. the switch swap really is cake though, 1 wire to the PCM, 1 wire to ground, done. should probably wire in a cruise clutch switch too, but that's also easy, just piggyback off the wiring on the brake cruise switch.

should be 2 solid yellow wires on the brake switch, cut one, then wire both cut ends to a switch similar to the one pictured above, any normally closed brake or clutch switch should work. nice thing about the one pictured earlier in the thread, is that is has two switched that both do what we need built into one, which makes packaging way easier.

[TGP37]

again, the switch was too easy to implement to worry with a relay.

again....?

[ericjon262]

edit:

removed...

[ericjon262]

again, the switch was too easy to implement to worry with a relay.

[TGP37]

not sure if i would want to use a relay on something that can be this time-critical.

good point. Especially using only 12v. Maybe a different story with 120v, but this isn't an RV...lol

[ericjon262]

several new pins were added.

Second ignition feed
Air pump relay control
sensor grounds
5V references

[ericjon262]

hmm... pulled up a diagram on autozone's website

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c152800b8816

it show's a very different pins then what I have found... unless I'm reading them wrong.

Edit:

I guess they're numbering the circuits, not the actual pins.

edit: here's another pinout, I'll leave it here for safe keeping...

http://www.regalgs.org/topic/47680-pcm-pinout-for-98-gs/

[ericjon262]

the switch swap was too easy to worry about messing with a relay