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Dead Battery in Key

 
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Old 07 Feb 2013, 11:05 pm
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Default Dead Battery in Key

Kinda a repost from another issue of my "PT DIED" I only have one key for the PT. I changed the Ign switch and acutator but not the key cylinder. If the key "battery" is bad will it not crank the motor. All I get is lights turn on but no crank. Trying to determine if it is the PCM or I need to replace the key cylinder as it may not comunicate with the car if the (key battery) is dead?

Thx for your help
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Old 08 Feb 2013, 02:52 am
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Default Re: Dead Battery in Key

If the car doesn't recognize the key it will still start but die within a few seconds.
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Old 08 Feb 2013, 07:16 am
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Default Re: Dead Battery in Key

If it's the key with the grey end on it, there's no battery inside, just a chip.

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Old 08 Feb 2013, 07:57 am
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Default Re: Dead Battery in Key

If your key has a battery, it is for the remote keyless entry...it has nothing to do with starting and ignition. A transponder key, like the one in the pic posted by Crewzin, has no battery. It has a non-volitile memory so it doesn't need a constant keep-alive voltage. It is powered by the electromagnetic field generated by the coil around the ignition lock.
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Old 08 Feb 2013, 08:05 am
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Default Re: Dead Battery in Key

As the others have said your key is fine. You may have a bad starter or some bad connections on they cables. Clean they big ground on the inner finder as well all the other cable ends.
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Old 08 Feb 2013, 02:02 pm
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Default Re: Dead Battery in Key

If you have a post 2006 model with keyless entry, then you have a battery inside your key, but as stated already, it doesn't affect starting.

You may very well have a bad PCM, which is very common, but it is not related to your key, and there's no reason to replace the tumbler (key cylinder).
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