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Old 10-01-2007, 04:27 AM   #1
67Coronet383
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1996 Chrysler Town & Country Ignition.

This guy has a 1996 Town & Country (3.3L I believe) and coil #3 of the ignition coil pack(I believe that is for cylinders 3 & 6) do not fire.
After testing, I found that the signal wire for that coil did not receive signal (ground) at any time with the engine running. This of course explain that coil not firing.

I checked his Haynes manual and it states that the PCM has drivers in it to control that ground signal. Also he got a shop manual and it said the same thing.

I'm thinking it is fairly safe to assume the PCM is faulty and at this point in diagnoses would be OK to move ahead with buying another one and replacing it. If the manual is correct and there is nothing else I should be concerned with in the ignition system to diagnose this, I doubt the problem could be a fault in the circuit such as a loose connection since the other signal wires work fine and the other 2 coil packs fire.


So, I'm just wanting to hear the chance of the PCM being his problem is very very good before I have him spend $200 on a new one.
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Old 10-01-2007, 06:35 PM   #2
67Coronet383
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Well I found a pinout and confirmed the wire from the PCM to the coil is fine. Ordered PCM...
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Old 10-02-2007, 06:42 PM   #3
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Originally Posted by 67Coronet383
Well I found a pinout and confirmed the wire from the PCM to the coil is fine. Ordered PCM...

Well, PCMs do go bad but I have never experienced it myself. Are any MIL's tripping the CEL to come on? I would make DAMN sure that all troubleshooting is exhausted before spending the money. That will not be cheap I am sure as the new computer will have to match the VIN due to electronics and circuits that only that car comes with.
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Old 10-04-2007, 09:27 PM   #4
67Coronet383
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PCM replaced, problem solved. :-D
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Old 10-04-2007, 10:08 PM   #5
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PCM replaced, problem solved. :-D


67, that is excellent. Glad to hear that you are back in business. Great job!
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