Electrical Headache! please help..
#1
Electrical Headache! please help..
Since this past fall i've been trying to get my sisters cavalier fixed. It started with a no spark condition. So i replaced the ckp, coils, and the ICM, to no avail, then finally one day i had the brilliant idea of checking the PCM. Long story short, it came out in 2 pieces and was more corroded then you can imagine! Along with that, the plugs were also very corroded. So i spliced in 3 'new' junkyard PCM plugs, along with a pcm. Finally the car starts, but only for 2 seconds before passlock shuts her down. I tried the 10 minute re-learn procedure, and also had the pcm reflashed, but its not recognizing the re flash! Anti-theft still shuts the car down. I'm at a loss now. If anybody can give me some suggestions/help, i would really appreciate it. Should i be testing for continuity/resistance in some wires between the ignition switch/ICM/PCM related to the passlock??
#3
Sorry, should've included info... 96 cav, manual with the 2.2, i believe all the ecu's were the same in 96, unlike some of the other years, but i'm sure you guys know more than i do. No aftermarket mods what so ever. It is the base model, no extra options.
#5
can you explain the 10 minute re-learn procedure you used exactly?
Who reprogrammed the PCM for you?
Did the donor car have the same motor\year?
part numbers on both the old and new PCM match?
I can't remember the PCM's exact configuration, but are these the ones with the removable PROM under a panel on the PCM? If so you MUST make sure the prom stays with the vehicle....do not use a donor PROM
Who reprogrammed the PCM for you?
Did the donor car have the same motor\year?
part numbers on both the old and new PCM match?
I can't remember the PCM's exact configuration, but are these the ones with the removable PROM under a panel on the PCM? If so you MUST make sure the prom stays with the vehicle....do not use a donor PROM
#6
can you explain the 10 minute re-learn procedure you used exactly?
Who reprogrammed the PCM for you?
Did the donor car have the same motor\year?
part numbers on both the old and new PCM match?
I can't remember the PCM's exact configuration, but are these the ones with the removable PROM under a panel on the PCM? If so you MUST make sure the prom stays with the vehicle....do not use a donor PROM
Who reprogrammed the PCM for you?
Did the donor car have the same motor\year?
part numbers on both the old and new PCM match?
I can't remember the PCM's exact configuration, but are these the ones with the removable PROM under a panel on the PCM? If so you MUST make sure the prom stays with the vehicle....do not use a donor PROM
#7
Ok so here's the scoop. It is a different PCM like i said, and i had swapped in the original PROM chip, i just forgot since i did it so many months ago. I think it should be fine to have a different PROM chip if you Flash it though shouldn't it? I think your suggestion must be if you dont plan on re-flashing. The only problem is that the old pcm was in such bad condition when removed that i suspect there could easily be some type of damage to the original PROM from being in the elements! So i think i might need to try a different PROM, but maybe you can let me know if thats not a good idea.
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#8
Did the light stop flashing after the 10 minutes? When you start it now, after it stalls does it begin to flash?
If you are going to buy a new PROM, and you have someone to prgram it for you, then you should be ok
If you are going to buy a new PROM, and you have someone to prgram it for you, then you should be ok
#9
Hey shawn, sorry it's taken me a while to get back. I havent had time to work on the car, i really just need about freezing temps to work with the wires... Anyhow, the light doesnt even flash, it just simply stays on permanently. When i try the whole relearn procedure, it doesnt change, but the car can always start up for about 1-2 secs, then shuts down with the light flashing for a second or 2, then back to a solid anti theft light. I may have to wire in something to fool this anti-theft. The diagnostic unit could not even reformat my pcm for the vehicle, so i think the easiest route may be bypassing the passlock.
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