Mechanics

WONT STAY RUNNING

1994 Chrysler LHS

Electrical problem
1994 Chrysler LHS 6 cyl Front Wheel Drive Automatic 97000 miles

I have a 94 LHS, it starts and runs for apx 5 secs. Then dies, this continues for apx 20 times, then the car will not start until the next day (no spark). I have replaced the fuel pump, the ecm, the plugs, plug wires, coil pack, cam and crank sensors.
I was told it is probably the auto shutoff or anti theft.
I was also told this:
The only explanation for a very precise shutdown after starting is the theft security system. I would suspect that it is alarmed out and needs to be disarmed. You can do that by lock/unlock either (both) front doors to see if that clears it. If not, then I suspect the wires from the door locks are 'open' somewhere along the path to the body computer which is located just in front of the passenger door opening on the 'kick panel'. It is hidden behind the carpeting and cloth liner. Begin by removing the end cap of the dash on that side. Remove the trim panel and pull carpet back which exposes the cloth liner. Trim the liner along its perforations to expose the computer. It has a screw at the top (oblong access hole just below knee bolster) and a push pin at the lower front corner that holds it in place. That will allow you easier access to the three plugs on the top of the computer. On pin #3 of the black plug you will find a light green/orange wire. Put a straight pin through its insulation to contact the conductor, then put a pin through the insulation of the black wire on pin 21 of the bone color plug. Then jump/unjump a wire between the two pins (or touch/untouch the two pins if they are long enough to reach). That is replicating the lock/unlock performance that I descibed above. Now try starting it. If I am right it should start and run.
There is no way I know of to disconnect the theft system, so what you have to do in the future is always simply use the mechanical push-button locks on the interior or the doors to secure the vehicle which will do so without setting the alarm ever again. Don't use the door key, or the power locks, or the remote (if you have one) so as to avoid setting the alarm again. If it happens again, that pin trick should work.
Problem is: I cannot find the computer he speaks of behind the kickplate on the passenger side. Is there a way to disarm the antitheft? Could it be the Valet switch, is there even a valet switch?
any help would be appreciated.
Thanks
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Shadowboxer3764
February 13, 2009.





http://www.2carpros.com/forum/automotive_pictures/55316_94lhsbcm_1.jpg



http://www.2carpros.com/forum/automotive_pictures/55316_94lhsbcm_2.jpg



http://www.2carpros.com/forum/automotive_pictures/55316_94lhsbcmconnector_1.jpg


Tiny
Zackman
Feb 14, 2009.
Thanks for the diagram Zackman.
I tried the trick or tip listed and it didnt work. It still starts for a few secs then dies.
I have also disconnected and completely removed the BCM from the car. Just for kicks I tried it and the car does exactly the same thing, starts, runs for a few secs, then dies.
Any other ideas?
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Tiny
Shadowboxer3764
Feb 14, 2009.
Then your anti-theft is not the problem. I would go back to square one and follow this diagnostic tips. Follow the list one by one.


http://www.2carpros.com/forum/automotive_pictures/55316_94lhsstrat_1.jpg


Tiny
Zackman
Feb 16, 2009.

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