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  #1  
Old 03-11-2008, 01:12 AM
 
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Default "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

(1997 Cadillac Eldorado--great car!!)

Ok, here's the situation: I've had problems with what I believe to be the fuel pump. About 10% of the time, the car will not start as it should. By this I mean, I have to damn near burn up my starter and pump the accelerator (I'm sure it being a fuel-injected car this does nothing except make me think I'm having a positive effect on it) before it finally catches and fires right up. No big deal. 10% I can deal with. I figured either bad pump, injector, lines, blah blah. On to my real problem...

The other day I went to start it and had the above problem. I did my little technique to no avail. I waited a few minutes and tried again. No go. The third time I cranked it, nothing happened at all--no sounds period. I thought I burned up my starter but then noticed my DIC reading a message about "Starting disabled...theft system detected." I called AAA to tow it but because I placed the e-brake on, it wouldn't release without the car running and being in Drive.

After messing with the gear shift, I tried cranking it in Neutral and IT WORKED!!! But then the DIC read "Theft system problem...car may not restart." I drove it to the dealer who diagnosed the problem to be in my PCM (apparently Cadillac language for the Body Control Module (BCM)). They told me the part listed for $550, labor costs of $150, and tax would fix the problem. I said no for now and drove it home and have been plowing my way through a bunch of threads and posts of people who are way more knowledgeable on this ____ than me.

I've outlined the information I've found so far and would like it very much if someone who knows this issue would help me put together a solid gameplan. I'm no mechanic by ANY means and I will probably end up taking this plan to the dealer and getting their mechanics to execute it. Any thoughts or suggestions are greatly appreciated!

The problems and solutions I have found on this issue thus far are many:

1. PASS Keys:
o Bad Resistor -- take keys to dealer and have them tested.
o Try using the spare key (I did and same message).
2. DTCs:
o Pull DTCs (whatever that is).
3. Replace the cluster:
4. Ignition Lock Cylinder
o Bad chip
o Bad Ignition wiring issue
o Bad contacts in the ignition cylinder.
5. Bypassing the VATS
o This may lead to a $2 resistor and a very cheap fix.
6. Two rack actuators and wiring missing/damaged inside the column.
o If so, bypass the lock and actuator using a 1/8" diameter steel rod.
7. Nuisance code:
o Suggestion is to "pause between key positions when starting the car to let the computer catch up to all the diagnostics on flash up."
8. Reset the computer:
o Disconnect the ground from the battery and leave off for several hours to reset computer.
9. VATS (Vehicle Anti Theft System) is a "widely known" problem.
o $75 parts cost (including keys), make sure the resistance matches current ones.
o Bypass the VATS ($30)--if so, "make sure the person patches into the VATS wires on the column-side of the plug," in case if ever in the future fixing it correctly is easy and cheap.
§ Measure the resistance of the key pellet, purchase one of equal measurement at Radio Shack for $1, then locate the two pin connectors under the steering colum and slice in the resistor.
o Make sure VATS is the same or a tad higher than what is currently on it, otherwise GM cars will not start.
o Bad decoder/reader, which are located in Timbuktu inside the dash.



http://www.lincolnvscadillac.com/showthread.php?t=5147
http://www.automotiveforums.com/vbulletin/t326861.html
http://caddyinfo.ipbhost.com/lofiver...php/t3155.html
http://www.cadillacforums.com/forums/cadillac-deville-1985-2005-including-1985/119604-theft-system-problem-car-may-not.html

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  #2  
Old 03-11-2008, 06:54 PM
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

If pcm is bad there should be code(s) stored. What exactly did dealer say was wrong? Also was it a GM dealer?
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  #3  
Old 03-12-2008, 12:36 AM
 
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

Thanks for the response. Yes, it was a GM dealer.

The dealer did not mention anything about codes, just that it'd cost me $700 to fix it. Do you think they would have recorded the codes on my file with them--so if I call, they would have a record of the pcm codes?

I found the part online for half the price they were charging me, but after reading what others have written I'm wondering whether I should just drive it until it gives out or if there is an alternative solution (i.e., bypassing thevats).

Thoughts?
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Old 03-12-2008, 06:52 PM
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

I would get second opinion, 90% of the time lock cylinder is the failed part. Driving to it fails means towing $$ on top of repair. It seems they want too much to repair it. You could press for more info from dealer concerning diagnosis.
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  #5  
Old 03-13-2008, 12:42 AM
 
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

I will press the dealer for more info later this week. If it is the lock cylinder how much would you estimate the part cost?
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  #6  
Old 07-15-2008, 11:37 AM
 
Join Date: Jul 2008
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

Ok, I have the same problem, except i have no communication with any of the modules ( PCM, PZM, IPC...etc) tried 2 scanners, to no avail. Also tried accessing the OBD through the temp control...again no Data. Have voltage at the DLC, and B+ and grounds at PCM harness. Both battery grounds are clean, and tight. Cranks and starts for about 3 secs...and thats it. [sm=headbang.gif][sm=headbang.gif][sm=headbang.gif]
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  #7  
Old 07-15-2008, 07:02 PM
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Default RE: "Theft System Problem...Car May Not Restart" PCM/BCM Problem or Wires?

Need more info, year and model. On Board not working isn't good. Any mods?
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  #8  
Old 02-17-2009, 09:31 AM
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Default VATS Issues

Thanks to the experience of forum, I had a similar problem cured. My 98 Eldorado would not start and showed "starter disabled" on display. I found a mechanic that would bypass the the passkey, and everything works great. Instead of the estimated $800 for the Caddy dealer to fix, my guy only charged $100.
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  #9  
Old 03-10-2009, 03:21 AM
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Default Brass air fittighttp://www.liangdianup.com/subpages/airfitting_1.htm

HELLO!!
Now that is a lot of brass air fittings there is just about every type
of air fitting that you could want. Wholesale prices too. I guess these could be used as small water pipe fitting also. I
used some of the parts to make my babington wvo bu
THANK YOU.
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  #10  
Old 05-27-2009, 12:38 PM
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Default Theft system problem/car may not restart.

Hi everyone, I'm encountering a similar situation.The car it does crank but won't start at all. Firstly I tried to bypass the VATS but I have noticed that those 2 white wires from ignition have same ohms like my pellet key( 2.37 / #8),However when I bypassed it the car won't even crank and I got :STARTING DISABLED DUE TO THEFT/REMOVE KEY......Then I realized that the problem is something else. Therse is no Security light on or flashing at all but I have PRND321 Flashing as soon as I put the key in ignition.I cleaned both battery terminal, checked all fuses.
I took the car to the dealer for diagnostic($99/hr.) The called me next day and ask me for $500.00 deposit ,claiming that their mecahnics spent already 2 hours and couldn't find what's the problem.The only thing they have told me was that there is no communication between those modules(pcm/bcm,vats....)
I'm desperate , I don't know what to do, my other car had a suspension failure and is undriveable(Mark VIII).
Please Help!!!!
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Old 05-27-2009, 12:38 PM
 
 
 
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1997, anti, cadillac, car, computer, decoder, deville, eldorado, module, problem, reset, restart, system, theft, vats


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