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ECU codes 320 and 340, possibly bad PCM?

 
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Old 18 Apr 2008, 06:27 pm
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Default ECU codes 320 and 340, possibly bad PCM?

I am having a problem determining for certain what is wrong with a friends car and thought that I would come to the enthusiasts for help. So, now you have a Nissan guy asking for the help of Chrysler fans.

Here is what I know:
-CEL codes 0320 (crank angle sensor), 0340 (cam angle sensor)
-The harness portion of the cam and crank angle sensors are good.
-"+" side of both sensors reads +8v, when plugged into PCM.
-"-" side of both sensors reads +5v, when plugged into PCM.
-Resistance between + and - when unplugged reads "open"
-Signal does not read applied voltages, so that is intact.
-Spark is present on all 4 coil outputs, but is weak and irregular.


What I suspect is that the negative side of these circuits has shorted in the PCM. How likely is this, and is it a common problem?

Looking on the web, I found this ptdoityourself.net PTDIY.net - PT Cruiser Technical Library Part Sixty Two Q&A 1526 - 1550
What is K7?

Thank you for your inputs.
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Old 18 May 2008, 09:34 pm
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Join Date: Mar 2008
Location: Orlando Florida
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Default Re: ECU codes 320 and 340, possibly bad PCM?

did you find the problem in this vehicle?
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Old 18 May 2008, 11:13 pm
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Default Re: ECU codes 320 and 340, possibly bad PCM?

Quote:
Originally Posted by partyd View Post
did you find the problem in this vehicle?
YES, yes we did, the problem ended up being a snapped timing belt.

I feel incredibly sorry for you PT people. I will never again in my life work on a FWD Chrystler. It took me about 15hrs of work to replace the timing belt.

I will stick to my RWD Nissans, they are much easier to work on.

Not to mention the incredibly odd wiring schemes that these things use. The indications that I was seeing are completely normal, I just needed to get my hands on a schematic.
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Old 19 May 2008, 07:44 pm
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Join Date: Dec 2003
Location: San Antonio, Texas
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Default Re: ECU codes 320 and 340, possibly bad PCM?

I personally feel the exact opposite. Love working on Chrysler and hate Nissan. I can get a timing belt done in about 3 hours. Ya just gotta know the tricks....
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Old 19 May 2008, 08:20 pm
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Join Date: Apr 2008
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Default Re: ECU codes 320 and 340, possibly bad PCM?

Yeah, that is the problem. You have to know the tricks, all 50 of them.

If I had to do it again, I could probably get it done in about 4-5hrs. Getting the timing belt on and keeping the cams in time is a bit of pain when you are solo.
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